31000097 has 4 divisors (see below), whose sum is σ = 31051776. Its totient is φ = 30948420.

The previous prime is 31000087. The next prime is 31000127. The reversal of 31000097 is 79000013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79000013 = 1019 ⋅77527.

It is a cyclic number.

It is not a de Polignac number, because 31000097 - 2¹⁴ = 30983713 is a prime.

It is a super-2 number, since 2×31000097² = 1922012028018818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31000087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24929 + ... + 26142.

It is an arithmetic number, because the mean of its divisors is an integer number (7762944).

Almost surely, 2^31000097 is an apocalyptic number.

It is an amenable number.

31000097 is a deficient number, since it is larger than the sum of its proper divisors (51679).

31000097 is an equidigital number, since it uses as much as digits as its factorization.

31000097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51678.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 31000097 is about 5567.7730736804. The cubic root of 31000097 is about 314.1383928882.

The spelling of 31000097 in words is "thirty-one million, ninety-seven", and thus it is an aban number and an uban number.