168097731 has 16 divisors (see below), whose sum is σ = 246186240. Its totient is φ = 101550240.

The previous prime is 168097687. The next prime is 168097733. The reversal of 168097731 is 137790861.

168097731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168097731 - 2¹⁸ = 167835587 is a prime.

It is a super-2 number, since 2×168097731² = 56513694334696722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (168097733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62800 + ... + 65421.

It is an arithmetic number, because the mean of its divisors is an integer number (15386640).

Almost surely, 2^168097731 is an apocalyptic number.

168097731 is a deficient number, since it is larger than the sum of its proper divisors (78088509).

168097731 is a wasteful number, since it uses less digits than its factorization.

168097731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128266.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 168097731 is about 12965.2509038584. The cubic root of 168097731 is about 551.8918115266.

The spelling of 168097731 in words is "one hundred sixty-eight million, ninety-seven thousand, seven hundred thirty-one".