165285977 has 2 divisors, whose sum is σ = 165285978. Its totient is φ = 165285976.

The previous prime is 165285949. The next prime is 165285983. The reversal of 165285977 is 779582561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116229961 + 49056016 = 10781^2 + 7004^2 .

It is a cyclic number.

It is not a de Polignac number, because 165285977 - 2¹² = 165281881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165285277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82642988 + 82642989.

It is an arithmetic number, because the mean of its divisors is an integer number (82642989).

Almost surely, 2^165285977 is an apocalyptic number.

It is an amenable number.

165285977 is a deficient number, since it is larger than the sum of its proper divisors (1).

165285977 is an equidigital number, since it uses as much as digits as its factorization.

165285977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

The square root of 165285977 is about 12856.3593991456. The cubic root of 165285977 is about 548.7973468002.

The spelling of 165285977 in words is "one hundred sixty-five million, two hundred eighty-five thousand, nine hundred seventy-seven".