161371759 has 2 divisors, whose sum is σ = 161371760. Its totient is φ = 161371758.

The previous prime is 161371741. The next prime is 161371783. The reversal of 161371759 is 957173161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161371759 - 2¹³ = 161363567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161371789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80685879 + 80685880.

It is an arithmetic number, because the mean of its divisors is an integer number (80685880).

Almost surely, 2^161371759 is an apocalyptic number.

161371759 is a deficient number, since it is larger than the sum of its proper divisors (1).

161371759 is an equidigital number, since it uses as much as digits as its factorization.

161371759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 40.

The square root of 161371759 is about 12703.2184504558. The cubic root of 161371759 is about 544.4305799777.

The spelling of 161371759 in words is "one hundred sixty-one million, three hundred seventy-one thousand, seven hundred fifty-nine".