31010433989 has 2 divisors, whose sum is σ = 31010433990. Its totient is φ = 31010433988.

The previous prime is 31010433977. The next prime is 31010433991. The reversal of 31010433989 is 98933401013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24717185089 + 6293248900 = 157217^2 + 79330^2 .

It is a cyclic number.

It is not a de Polignac number, because 31010433989 - 2¹⁶ = 31010368453 is a prime.

It is a super-2 number, since 2×31010433989² (a number of 22 digits) contains 22 as substring.

Together with 31010433991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31010433929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15505216994 + 15505216995.

It is an arithmetic number, because the mean of its divisors is an integer number (15505216995).

Almost surely, 2^31010433989 is an apocalyptic number.

It is an amenable number.

31010433989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31010433989 is an equidigital number, since it uses as much as digits as its factorization.

31010433989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 31010433989 in words is "thirty-one billion, ten million, four hundred thirty-three thousand, nine hundred eighty-nine".