161868597 has 24 divisors (see below), whose sum is σ = 239463840. Its totient is φ = 97178400.

The previous prime is 161868589. The next prime is 161868601. The reversal of 161868597 is 795868161.

It is not a de Polignac number, because 161868597 - 2³ = 161868589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161868557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37522 + ... + 41612.

It is an arithmetic number, because the mean of its divisors is an integer number (9977660).

Almost surely, 2^161868597 is an apocalyptic number.

It is an amenable number.

161868597 is a deficient number, since it is larger than the sum of its proper divisors (77595243).

161868597 is a wasteful number, since it uses less digits than its factorization.

161868597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225 (or 4214 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 161868597 is about 12722.7590168171. The cubic root of 161868597 is about 544.9887459450.

The spelling of 161868597 in words is "one hundred sixty-one million, eight hundred sixty-eight thousand, five hundred ninety-seven".