31292565749 has 2 divisors, whose sum is σ = 31292565750. Its totient is φ = 31292565748.

The previous prime is 31292565743. The next prime is 31292565823. The reversal of 31292565749 is 94756529213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30295143025 + 997422724 = 174055^2 + 31582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31292565749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31292565749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31292565743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15646282874 + 15646282875.

It is an arithmetic number, because the mean of its divisors is an integer number (15646282875).

Almost surely, 2^31292565749 is an apocalyptic number.

It is an amenable number.

31292565749 is a deficient number, since it is larger than the sum of its proper divisors (1).

31292565749 is an equidigital number, since it uses as much as digits as its factorization.

31292565749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 53.

The spelling of 31292565749 in words is "thirty-one billion, two hundred ninety-two million, five hundred sixty-five thousand, seven hundred forty-nine".