161736979 has 2 divisors, whose sum is σ = 161736980. Its totient is φ = 161736978.

The previous prime is 161736961. The next prime is 161737001. The reversal of 161736979 is 979637161.

161736979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161736979 - 2⁵ = 161736947 is a prime.

It is not a weakly prime, because it can be changed into another prime (161736959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80868489 + 80868490.

It is an arithmetic number, because the mean of its divisors is an integer number (80868490).

Almost surely, 2^161736979 is an apocalyptic number.

161736979 is a deficient number, since it is larger than the sum of its proper divisors (1).

161736979 is an equidigital number, since it uses as much as digits as its factorization.

161736979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 161736979 is about 12717.5854233420. The cubic root of 161736979 is about 544.8409928074.

The spelling of 161736979 in words is "one hundred sixty-one million, seven hundred thirty-six thousand, nine hundred seventy-nine".