97837821 has 16 divisors (see below), whose sum is σ = 152574400. Its totient is φ = 61791984.

The previous prime is 97837819. The next prime is 97837823. The reversal of 97837821 is 12873879.

It is an interprime number because it is at equal distance from previous prime (97837819) and next prime (97837823).

It is not a de Polignac number, because 97837821 - 2¹ = 97837819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97837823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94846 + ... + 95871.

It is an arithmetic number, because the mean of its divisors is an integer number (9535900).

Almost surely, 2^97837821 is an apocalyptic number.

It is an amenable number.

97837821 is a deficient number, since it is larger than the sum of its proper divisors (54736579).

97837821 is a wasteful number, since it uses less digits than its factorization.

97837821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190745 (or 190739 counting only the distinct ones).

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

The square root of 97837821 is about 9891.3002684177. The cubic root of 97837821 is about 460.7891636313.

The spelling of 97837821 in words is "ninety-seven million, eight hundred thirty-seven thousand, eight hundred twenty-one".