161173577 has 2 divisors, whose sum is σ = 161173578. Its totient is φ = 161173576.

The previous prime is 161173543. The next prime is 161173609. The reversal of 161173577 is 775371161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116229961 + 44943616 = 10781^2 + 6704^2 .

It is a cyclic number.

It is not a de Polignac number, because 161173577 - 2⁸ = 161173321 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161173577.

It is not a weakly prime, because it can be changed into another prime (161172577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80586788 + 80586789.

It is an arithmetic number, because the mean of its divisors is an integer number (80586789).

Almost surely, 2^161173577 is an apocalyptic number.

It is an amenable number.

161173577 is a deficient number, since it is larger than the sum of its proper divisors (1).

161173577 is an equidigital number, since it uses as much as digits as its factorization.

161173577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 38.

The square root of 161173577 is about 12695.4155898891. The cubic root of 161173577 is about 544.2076154360.

The spelling of 161173577 in words is "one hundred sixty-one million, one hundred seventy-three thousand, five hundred seventy-seven".