31040997 has 16 divisors (see below), whose sum is σ = 47194560. Its totient is φ = 17978112.

The previous prime is 31040983. The next prime is 31041019. The reversal of 31040997 is 79904013.

It is not a de Polignac number, because 31040997 - 2⁸ = 31040741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22747 + ... + 24072.

It is an arithmetic number, because the mean of its divisors is an integer number (2949660).

Almost surely, 2^31040997 is an apocalyptic number.

It is an amenable number.

31040997 is a deficient number, since it is larger than the sum of its proper divisors (16153563).

31040997 is a wasteful number, since it uses less digits than its factorization.

31040997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46852.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 31040997 is about 5571.4447856907. Note that the first 3 decimals coincide. The cubic root of 31040997 is about 314.2764850792.

The spelling of 31040997 in words is "thirty-one million, forty thousand, nine hundred ninety-seven".