31004997 has 8 divisors (see below), whose sum is σ = 41521440. Its totient is φ = 20579280.

The previous prime is 31004977. The next prime is 31005041. The reversal of 31004997 is 79940013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31004997 - 2⁶ = 31004933 is a prime.

It is a super-2 number, since 2×31004997² = 1922619677940018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21879 + ... + 23252.

It is an arithmetic number, because the mean of its divisors is an integer number (5190180).

Almost surely, 2^31004997 is an apocalyptic number.

It is an amenable number.

31004997 is a deficient number, since it is larger than the sum of its proper divisors (10516443).

31004997 is a wasteful number, since it uses less digits than its factorization.

31004997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45363.

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

The square root of 31004997 is about 5568.2130885949. The cubic root of 31004997 is about 314.1549433421.

The spelling of 31004997 in words is "thirty-one million, four thousand, nine hundred ninety-seven".