31240763069 has 2 divisors, whose sum is σ = 31240763070. Its totient is φ = 31240763068.

The previous prime is 31240762999. The next prime is 31240763111. The reversal of 31240763069 is 96036704213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31049964100 + 190798969 = 176210^2 + 13813^2 .

It is an emirp because it is prime and its reverse (96036704213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31240763069 - 2¹² = 31240758973 is a prime.

It is a super-2 number, since 2×31240763069² (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 (31240763569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620381534 + 15620381535.

It is an arithmetic number, because the mean of its divisors is an integer number (15620381535).

Almost surely, 2^31240763069 is an apocalyptic number.

It is an amenable number.

31240763069 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240763069 is an equidigital number, since it uses as much as digits as its factorization.

31240763069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 31240763069 in words is "thirty-one billion, two hundred forty million, seven hundred sixty-three thousand, sixty-nine".