161597297 has 2 divisors, whose sum is σ = 161597298. Its totient is φ = 161597296.

The previous prime is 161597281. The next prime is 161597323. The reversal of 161597297 is 792795161.

161597297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123454321 + 38142976 = 11111^2 + 6176^2 .

It is a cyclic number.

It is not a de Polignac number, because 161597297 - 2⁴ = 161597281 is a prime.

It is a super-2 number, since 2×161597297² = 52227372795412418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161597197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80798648 + 80798649.

It is an arithmetic number, because the mean of its divisors is an integer number (80798649).

Almost surely, 2^161597297 is an apocalyptic number.

It is an amenable number.

161597297 is a deficient number, since it is larger than the sum of its proper divisors (1).

161597297 is an equidigital number, since it uses as much as digits as its factorization.

161597297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 47.

The square root of 161597297 is about 12712.0925500092. The cubic root of 161597297 is about 544.6840993964.

The spelling of 161597297 in words is "one hundred sixty-one million, five hundred ninety-seven thousand, two hundred ninety-seven".