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13230430993 = 131377428653
BaseRepresentation
bin11000101001001100…
…00101101100010001
31021011001101112100201
430110212011230101
5204043442242433
610024502015201
7645601544053
oct142446055421
937131345321
1013230430993
11567a26269a
122692a17501
13132b0521c0
148d71cd8d3
155267bca7d
hex314985b11

13230430993 has 8 divisors (see below), whose sum is σ = 14352159528. Its totient is φ = 12123560064.

The previous prime is 13230430991. The next prime is 13230431003. The reversal of 13230430993 is 39903403231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4104067969 + 9126363024 = 64063^2 + 95532^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13230430993 - 21 = 13230430991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13230430991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3712546 + ... + 3716107.

It is an arithmetic number, because the mean of its divisors is an integer number (1794019941).

Almost surely, 213230430993 is an apocalyptic number.

13230430993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13230430993 is a deficient number, since it is larger than the sum of its proper divisors (1121728535).

13230430993 is a wasteful number, since it uses less digits than its factorization.

13230430993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428803.

The product of its (nonzero) digits is 52488, while the sum is 37.

The spelling of 13230430993 in words is "thirteen billion, two hundred thirty million, four hundred thirty thousand, nine hundred ninety-three".

Divisors: 1 13 137 1781 7428653 96572489 1017725461 13230430993