31240974097 has 2 divisors, whose sum is σ = 31240974098. Its totient is φ = 31240974096.

The previous prime is 31240974053. The next prime is 31240974113. The reversal of 31240974097 is 79047904213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21420956881 + 9820017216 = 146359^2 + 99096^2 .

It is a cyclic number.

It is not a de Polignac number, because 31240974097 - 2¹⁹ = 31240449809 is a prime.

It is a super-3 number, since 3×31240974097³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (31240974007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620487048 + 15620487049.

It is an arithmetic number, because the mean of its divisors is an integer number (15620487049).

Almost surely, 2^31240974097 is an apocalyptic number.

It is an amenable number.

31240974097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240974097 is an equidigital number, since it uses as much as digits as its factorization.

31240974097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 31240974097 in words is "thirty-one billion, two hundred forty million, nine hundred seventy-four thousand, ninety-seven".