97165890 has 24 divisors (see below), whose sum is σ = 252631548. Its totient is φ = 25910880.

The previous prime is 97165787. The next prime is 97165891. The reversal of 97165890 is 9856179.

It can be written as a sum of positive squares in 2 ways, for example, as 88003161 + 9162729 = 9381^2 + 3027^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (97165891) 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 11 ways as a sum of consecutive naturals, for example, 539721 + ... + 539900.

Almost surely, 2^97165890 is an apocalyptic number.

97165890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

97165890 is an abundant number, since it is smaller than the sum of its proper divisors (155465658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97165890 is a wasteful number, since it uses less digits than its factorization.

97165890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079634 (or 1079631 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 97165890 is about 9857.2759928897. The cubic root of 97165890 is about 459.7318695741.

The spelling of 97165890 in words is "ninety-seven million, one hundred sixty-five thousand, eight hundred ninety".