165239377 has 2 divisors, whose sum is σ = 165239378. Its totient is φ = 165239376.

The previous prime is 165239341. The next prime is 165239381. The reversal of 165239377 is 773932561.

It is a happy number.

165239377 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 can be written as a sum of positive squares in only one way, i.e., 95082001 + 70157376 = 9751^2 + 8376^2 .

It is an emirp because it is prime and its reverse (773932561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165239377 - 2²⁷ = 31021649 is a prime.

It is a super-2 number, since 2×165239377² = 54608103422696258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165239317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82619688 + 82619689.

It is an arithmetic number, because the mean of its divisors is an integer number (82619689).

Almost surely, 2^165239377 is an apocalyptic number.

It is an amenable number.

165239377 is a deficient number, since it is larger than the sum of its proper divisors (1).

165239377 is an equidigital number, since it uses as much as digits as its factorization.

165239377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 43.

The square root of 165239377 is about 12854.5469387295. The cubic root of 165239377 is about 548.7457667840.

The spelling of 165239377 in words is "one hundred sixty-five million, two hundred thirty-nine thousand, three hundred seventy-seven".