31352061989 has 2 divisors, whose sum is σ = 31352061990. Its totient is φ = 31352061988.

The previous prime is 31352061977. The next prime is 31352062039. The reversal of 31352061989 is 98916025313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15760793764 + 15591268225 = 125542^2 + 124865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31352061989 is a prime.

It is a super-2 number, since 2×31352061989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31352061089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676030994 + 15676030995.

It is an arithmetic number, because the mean of its divisors is an integer number (15676030995).

Almost surely, 2^31352061989 is an apocalyptic number.

It is an amenable number.

31352061989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31352061989 is an equidigital number, since it uses as much as digits as its factorization.

31352061989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 31352061989 in words is "thirty-one billion, three hundred fifty-two million, sixty-one thousand, nine hundred eighty-nine".