31794903989 has 4 divisors (see below), whose sum is σ = 31811990700. Its totient is φ = 31777817280.

The previous prime is 31794903977. The next prime is 31794903991. The reversal of 31794903989 is 98930949713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7230611089 + 24564292900 = 85033^2 + 156730^2 .

It is a cyclic number.

It is not a de Polignac number, because 31794903989 - 2⁸ = 31794903733 is a prime.

It is a super-2 number, since 2×31794903989² (a number of 22 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 (31794903919) 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, 8540564 + ... + 8544285.

It is an arithmetic number, because the mean of its divisors is an integer number (7952997675).

Almost surely, 2^31794903989 is an apocalyptic number.

It is an amenable number.

31794903989 is a deficient number, since it is larger than the sum of its proper divisors (17086711).

31794903989 is a wasteful number, since it uses less digits than its factorization.

31794903989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17086710.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 31794903989 in words is "thirty-one billion, seven hundred ninety-four million, nine hundred three thousand, nine hundred eighty-nine".