161545297 has 2 divisors, whose sum is σ = 161545298. Its totient is φ = 161545296.

The previous prime is 161545273. The next prime is 161545313. The reversal of 161545297 is 792545161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156775441 + 4769856 = 12521^2 + 2184^2 .

It is a cyclic number.

It is not a de Polignac number, because 161545297 - 2²⁷ = 27327569 is a prime.

It is not a weakly prime, because it can be changed into another prime (161545697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80772648 + 80772649.

It is an arithmetic number, because the mean of its divisors is an integer number (80772649).

Almost surely, 2^161545297 is an apocalyptic number.

It is an amenable number.

161545297 is a deficient number, since it is larger than the sum of its proper divisors (1).

161545297 is an equidigital number, since it uses as much as digits as its factorization.

161545297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 40.

The square root of 161545297 is about 12710.0470888191. The cubic root of 161545297 is about 544.6256689394.

The spelling of 161545297 in words is "one hundred sixty-one million, five hundred forty-five thousand, two hundred ninety-seven".