161172967 has 2 divisors, whose sum is σ = 161172968. Its totient is φ = 161172966.

The previous prime is 161172961. The next prime is 161172997. The reversal of 161172967 is 769271161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161172967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161172961) 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, 80586483 + 80586484.

It is an arithmetic number, because the mean of its divisors is an integer number (80586484).

Almost surely, 2^161172967 is an apocalyptic number.

161172967 is a deficient number, since it is larger than the sum of its proper divisors (1).

161172967 is an equidigital number, since it uses as much as digits as its factorization.

161172967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 40.

The square root of 161172967 is about 12695.3915654461. The cubic root of 161172967 is about 544.2069288738.

The spelling of 161172967 in words is "one hundred sixty-one million, one hundred seventy-two thousand, nine hundred sixty-seven".