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30385127693 = 191599217247
BaseRepresentation
bin11100010011000110…
…000100000100001101
32220102120222102020202
4130103012010010031
5444212043041233
621543030423245
72123654216054
oct342306040415
986376872222
1030385127693
1111982681188
125a7bb01b25
132b330ca1cb
14168365b39b
15bcc850be8
hex71318410d

30385127693 has 4 divisors (see below), whose sum is σ = 31984344960. Its totient is φ = 28785910428.

The previous prime is 30385127657. The next prime is 30385127737. The reversal of 30385127693 is 39672158303.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39672158303 = 71558762793.

It is a cyclic number.

It is not a de Polignac number, because 30385127693 - 26 = 30385127629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30385127393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799608605 + ... + 799608642.

It is an arithmetic number, because the mean of its divisors is an integer number (7996086240).

Almost surely, 230385127693 is an apocalyptic number.

It is an amenable number.

30385127693 is a deficient number, since it is larger than the sum of its proper divisors (1599217267).

30385127693 is a wasteful number, since it uses less digits than its factorization.

30385127693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599217266.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 30385127693 in words is "thirty billion, three hundred eighty-five million, one hundred twenty-seven thousand, six hundred ninety-three".

Divisors: 1 19 1599217247 30385127693