161560297 has 2 divisors, whose sum is σ = 161560298. Its totient is φ = 161560296.

The previous prime is 161560283. The next prime is 161560327. The reversal of 161560297 is 792065161.

161560297 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., 161518681 + 41616 = 12709^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 161560297 - 2¹⁵ = 161527529 is a prime.

It is a super-2 number, since 2×161560297² = 52203459133456418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161560237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80780148 + 80780149.

It is an arithmetic number, because the mean of its divisors is an integer number (80780149).

Almost surely, 2^161560297 is an apocalyptic number.

It is an amenable number.

161560297 is a deficient number, since it is larger than the sum of its proper divisors (1).

161560297 is an equidigital number, since it uses as much as digits as its factorization.

161560297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 161560297 is about 12710.6371594818. The cubic root of 161560297 is about 544.6425251655.

The spelling of 161560297 in words is "one hundred sixty-one million, five hundred sixty thousand, two hundred ninety-seven".