97827831 has 10 divisors (see below), whose sum is σ = 146137992. Its totient is φ = 65218500.

The previous prime is 97827823. The next prime is 97827857. The reversal of 97827831 is 13872879.

It is not a de Polignac number, because 97827831 - 2³ = 97827823 is a prime.

It is a super-2 number, since 2×97827831² = 19140569036329122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97827731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 603795 + ... + 603956.

Almost surely, 2^97827831 is an apocalyptic number.

97827831 is a deficient number, since it is larger than the sum of its proper divisors (48310161).

97827831 is a wasteful number, since it uses less digits than its factorization.

97827831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207763 (or 1207754 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 97827831 is about 9890.7952663070. The cubic root of 97827831 is about 460.7734797156.

The spelling of 97827831 in words is "ninety-seven million, eight hundred twenty-seven thousand, eight hundred thirty-one".