12345903457 has 4 divisors (see below), whose sum is σ = 12421645360. Its totient is φ = 12270161556.

The previous prime is 12345903443. The next prime is 12345903473. The reversal of 12345903457 is 75430954321.

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.

It is a cyclic number.

It is not a de Polignac number, because 12345903457 - 2²⁷ = 12211685729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12345903487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37870707 + ... + 37871032.

It is an arithmetic number, because the mean of its divisors is an integer number (3105411340).

Almost surely, 2^12345903457 is an apocalyptic number.

It is an amenable number.

12345903457 is a deficient number, since it is larger than the sum of its proper divisors (75741903).

12345903457 is an equidigital number, since it uses as much as digits as its factorization.

12345903457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75741902.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 12345903457 in words is "twelve billion, three hundred forty-five million, nine hundred three thousand, four hundred fifty-seven".