31323097 has 4 divisors (see below), whose sum is σ = 33732580. Its totient is φ = 28913616.

The previous prime is 31323023. The next prime is 31323107. The reversal of 31323097 is 79032313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79032313 = 113 ⋅699401.

It can be written as a sum of positive squares in 2 ways, for example, as 14969161 + 16353936 = 3869^2 + 4044^2 .

It is a cyclic number.

It is not a de Polignac number, because 31323097 - 2¹¹ = 31321049 is a prime.

It is a super-2 number, since 2×31323097² = 1962272811342818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31327097) 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, 1204722 + ... + 1204747.

It is an arithmetic number, because the mean of its divisors is an integer number (8433145).

Almost surely, 2^31323097 is an apocalyptic number.

It is an amenable number.

31323097 is a deficient number, since it is larger than the sum of its proper divisors (2409483).

31323097 is a wasteful number, since it uses less digits than its factorization.

31323097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409482.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 31323097 is about 5596.7041193903. The cubic root of 31323097 is about 315.2256617655.

The spelling of 31323097 in words is "thirty-one million, three hundred twenty-three thousand, ninety-seven".