160965977 has 4 divisors (see below), whose sum is σ = 161991396. Its totient is φ = 159940560.

The previous prime is 160965941. The next prime is 160965989. The reversal of 160965977 is 779569061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779569061 = 23 ⋅33894307.

It can be written as a sum of positive squares in 2 ways, for example, as 107661376 + 53304601 = 10376^2 + 7301^2 .

It is a cyclic number.

It is not a de Polignac number, because 160965977 - 2⁶ = 160965913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160965377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512474 + ... + 512787.

It is an arithmetic number, because the mean of its divisors is an integer number (40497849).

Almost surely, 2^160965977 is an apocalyptic number.

It is an amenable number.

160965977 is a deficient number, since it is larger than the sum of its proper divisors (1025419).

160965977 is a wasteful number, since it uses less digits than its factorization.

160965977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025418.

The product of its (nonzero) digits is 714420, while the sum is 50.

The square root of 160965977 is about 12687.2367755946. The cubic root of 160965977 is about 543.9738590830.

The spelling of 160965977 in words is "one hundred sixty million, nine hundred sixty-five thousand, nine hundred seventy-seven".