31288105969 has 2 divisors, whose sum is σ = 31288105970. Its totient is φ = 31288105968.

The previous prime is 31288105949. The next prime is 31288105973. The reversal of 31288105969 is 96950188213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30076230625 + 1211875344 = 173425^2 + 34812^2 .

It is an emirp because it is prime and its reverse (96950188213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31288105969 - 2⁷ = 31288105841 is a prime.

It is a super-2 number, since 2×31288105969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31288105939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15644052984 + 15644052985.

It is an arithmetic number, because the mean of its divisors is an integer number (15644052985).

Almost surely, 2^31288105969 is an apocalyptic number.

It is an amenable number.

31288105969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31288105969 is an equidigital number, since it uses as much as digits as its factorization.

31288105969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 31288105969 in words is "thirty-one billion, two hundred eighty-eight million, one hundred five thousand, nine hundred sixty-nine".