31314791 has 2 divisors, whose sum is σ = 31314792. Its totient is φ = 31314790.

The previous prime is 31314779. The next prime is 31314823. The reversal of 31314791 is 19741313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31314791 is a prime.

It is a super-2 number, since 2×31314791² = 1961232270747362, which contains 22 as substring.

It is equal to p_1934183 and since 31314791 and 1934183 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31314091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15657395 + 15657396.

It is an arithmetic number, because the mean of its divisors is an integer number (15657396).

Almost surely, 2^31314791 is an apocalyptic number.

31314791 is a deficient number, since it is larger than the sum of its proper divisors (1).

31314791 is an equidigital number, since it uses as much as digits as its factorization.

31314791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 31314791 is about 5595.9620263186. The cubic root of 31314791 is about 315.1977963237.

The spelling of 31314791 in words is "thirty-one million, three hundred fourteen thousand, seven hundred ninety-one".