97839 has 12 divisors (see below), whose sum is σ = 161616. Its totient is φ = 55872.

The previous prime is 97829. The next prime is 97841. The reversal of 97839 is 93879.

97839 = 77² + 78² + ... + 90².

It is not a de Polignac number, because 97839 - 2⁷ = 97711 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (13468).

2⁹⁷⁸³⁹ is an apocalyptic number.

97839 is a deficient number, since it is larger than the sum of its proper divisors (63777).

97839 is a wasteful number, since it uses less digits than its factorization.

97839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1563 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 97839 is about 312.7922633314. The cubic root of 97839 is about 46.0791014546.

The spelling of 97839 in words is "ninety-seven thousand, eight hundred thirty-nine".