12904985903 has 4 divisors (see below), whose sum is σ = 12905219808. Its totient is φ = 12904752000.

The previous prime is 12904985869. The next prime is 12904985909. The reversal of 12904985903 is 30958940921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30958940921 = 37 ⋅836728133.

It is a cyclic number.

It is not a de Polignac number, because 12904985903 - 2¹⁸ = 12904723759 is a prime.

It is a super-2 number, since 2×12904985903² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12904985909) 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, 16778 + ... + 161528.

It is an arithmetic number, because the mean of its divisors is an integer number (3226304952).

Almost surely, 2^12904985903 is an apocalyptic number.

12904985903 is a deficient number, since it is larger than the sum of its proper divisors (233905).

12904985903 is an equidigital number, since it uses as much as digits as its factorization.

12904985903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233904.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 12904985903 in words is "twelve billion, nine hundred four million, nine hundred eighty-five thousand, nine hundred three".