31412993 has 4 divisors (see below), whose sum is σ = 31513668. Its totient is φ = 31312320.

The previous prime is 31412981. The next prime is 31413077. The reversal of 31412993 is 39921413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1459264 + 29953729 = 1208^2 + 5473^2 .

It is a cyclic number.

It is not a de Polignac number, because 31412993 - 2⁴ = 31412977 is a prime.

It is a super-2 number, since 2×31412993² = 1973552258436098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31412903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49868 + ... + 50493.

It is an arithmetic number, because the mean of its divisors is an integer number (7878417).

Almost surely, 2^31412993 is an apocalyptic number.

It is an amenable number.

31412993 is a deficient number, since it is larger than the sum of its proper divisors (100675).

31412993 is a wasteful number, since it uses less digits than its factorization.

31412993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100674.

The product of its digits is 5832, while the sum is 32.

The square root of 31412993 is about 5604.7295206816. The cubic root of 31412993 is about 315.5269352960.

The spelling of 31412993 in words is "thirty-one million, four hundred twelve thousand, nine hundred ninety-three".