31900026869 has 4 divisors (see below), whose sum is σ = 32012748096. Its totient is φ = 31787305644.

The previous prime is 31900026853. The next prime is 31900026889. The reversal of 31900026869 is 96862000913.

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 31900026869 - 2⁴ = 31900026853 is a prime.

It is a super-2 number, since 2×31900026869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31900026889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56360189 + ... + 56360754.

It is an arithmetic number, because the mean of its divisors is an integer number (8003187024).

Almost surely, 2^31900026869 is an apocalyptic number.

It is an amenable number.

31900026869 is a deficient number, since it is larger than the sum of its proper divisors (112721227).

31900026869 is a wasteful number, since it uses less digits than its factorization.

31900026869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112721226.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 31900026869 in words is "thirty-one billion, nine hundred million, twenty-six thousand, eight hundred sixty-nine".