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30754393 = 155919727
BaseRepresentation
bin111010101010…
…0011001011001
32010212111002121
41311110121121
530333120033
63015101241
7522256645
oct165243131
963774077
1030754393
11163a625a
12a371821
1364aa487
144127c25
152a7762d
hex1d54659

30754393 has 4 divisors (see below), whose sum is σ = 30775680. Its totient is φ = 30733108.

The previous prime is 30754379. The next prime is 30754429. The reversal of 30754393 is 39345703.

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: 39345703 = 367107209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30754393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30754313) 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, 8305 + ... + 11422.

It is an arithmetic number, because the mean of its divisors is an integer number (7693920).

Almost surely, 230754393 is an apocalyptic number.

It is an amenable number.

30754393 is a deficient number, since it is larger than the sum of its proper divisors (21287).

30754393 is a wasteful number, since it uses less digits than its factorization.

30754393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21286.

The product of its (nonzero) digits is 34020, while the sum is 34.

The square root of 30754393 is about 5545.6643425292. The cubic root of 30754393 is about 313.3062462123.

The spelling of 30754393 in words is "thirty million, seven hundred fifty-four thousand, three hundred ninety-three".

Divisors: 1 1559 19727 30754393