31076993 has 4 divisors (see below), whose sum is σ = 31384788. Its totient is φ = 30769200.

The previous prime is 31076977. The next prime is 31077017. The reversal of 31076993 is 39967013.

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 18601969 + 12475024 = 4313^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 31076993 - 2⁴ = 31076977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31076953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153746 + ... + 153947.

It is an arithmetic number, because the mean of its divisors is an integer number (7846197).

Almost surely, 2^31076993 is an apocalyptic number.

It is an amenable number.

31076993 is a deficient number, since it is larger than the sum of its proper divisors (307795).

31076993 is a wasteful number, since it uses less digits than its factorization.

31076993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307794.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 31076993 is about 5574.6742505729. The cubic root of 31076993 is about 314.3979193911.

The spelling of 31076993 in words is "thirty-one million, seventy-six thousand, nine hundred ninety-three".