161277967 has 2 divisors, whose sum is σ = 161277968. Its totient is φ = 161277966.

The previous prime is 161277959. The next prime is 161277971. The reversal of 161277967 is 769772161.

161277967 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 is a cyclic number.

It is not a de Polignac number, because 161277967 - 2³ = 161277959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161277667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80638983 + 80638984.

It is an arithmetic number, because the mean of its divisors is an integer number (80638984).

Almost surely, 2^161277967 is an apocalyptic number.

161277967 is a deficient number, since it is larger than the sum of its proper divisors (1).

161277967 is an equidigital number, since it uses as much as digits as its factorization.

161277967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 46.

The square root of 161277967 is about 12699.5262510064. The cubic root of 161277967 is about 544.3250821107.

The spelling of 161277967 in words is "one hundred sixty-one million, two hundred seventy-seven thousand, nine hundred sixty-seven".