97831 has 6 divisors (see below), whose sum is σ = 103632. Its totient is φ = 92340.

The previous prime is 97829. The next prime is 97841. The reversal of 97831 is 13879.

It is not a de Polignac number, because 97831 - 2¹ = 97829 is a prime.

It is a super-2 number, since 2×97831² = 19141809122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226 + ... + 496.

It is an arithmetic number, because the mean of its divisors is an integer number (17272).

2⁹⁷⁸³¹ is an apocalyptic number.

97831 is a deficient number, since it is larger than the sum of its proper divisors (5801).

97831 is a wasteful number, since it uses less digits than its factorization.

97831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 290 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 97831 is about 312.7794750299. The cubic root of 97831 is about 46.0778455039.

The spelling of 97831 in words is "ninety-seven thousand, eight hundred thirty-one".