161000057 has 2 divisors, whose sum is σ = 161000058. Its totient is φ = 161000056.

The previous prime is 161000017. The next prime is 161000089. The reversal of 161000057 is 750000161.

161000057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150528361 + 10471696 = 12269^2 + 3236^2 .

It is an emirp because it is prime and its reverse (750000161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161000057 is a prime.

It is not a weakly prime, because it can be changed into another prime (161000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80500028 + 80500029.

It is an arithmetic number, because the mean of its divisors is an integer number (80500029).

Almost surely, 2^161000057 is an apocalyptic number.

It is an amenable number.

161000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

161000057 is an equidigital number, since it uses as much as digits as its factorization.

161000057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 161000057 is about 12688.5797865640. The cubic root of 161000057 is about 544.0122467417.

The spelling of 161000057 in words is "one hundred sixty-one million, fifty-seven", and thus it is an aban number.