161245937 has 2 divisors, whose sum is σ = 161245938. Its totient is φ = 161245936.

The previous prime is 161245871. The next prime is 161245967. The reversal of 161245937 is 739542161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82373776 + 78872161 = 9076^2 + 8881^2 .

It is a cyclic number.

It is not a de Polignac number, because 161245937 - 2¹⁰ = 161244913 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 161245937.

It is not a weakly prime, because it can be changed into another prime (161245967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80622968 + 80622969.

It is an arithmetic number, because the mean of its divisors is an integer number (80622969).

Almost surely, 2^161245937 is an apocalyptic number.

It is an amenable number.

161245937 is a deficient number, since it is larger than the sum of its proper divisors (1).

161245937 is an equidigital number, since it uses as much as digits as its factorization.

161245937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 161245937 is about 12698.2651177238. The cubic root of 161245937 is about 544.2890451843.

The spelling of 161245937 in words is "one hundred sixty-one million, two hundred forty-five thousand, nine hundred thirty-seven".