31345799 has 2 divisors, whose sum is σ = 31345800. Its totient is φ = 31345798.

The previous prime is 31345793. The next prime is 31345813. The reversal of 31345799 is 99754313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31345799 is a prime.

It is a super-2 number, since 2×31345799² = 1965118229896802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31345793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672899 + 15672900.

It is an arithmetic number, because the mean of its divisors is an integer number (15672900).

Almost surely, 2^31345799 is an apocalyptic number.

31345799 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345799 is an equidigital number, since it uses as much as digits as its factorization.

31345799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 31345799 is about 5598.7319099953. The cubic root of 31345799 is about 315.3017986047.

The spelling of 31345799 in words is "thirty-one million, three hundred forty-five thousand, seven hundred ninety-nine".