165419057 has 2 divisors, whose sum is σ = 165419058. Its totient is φ = 165419056.

The previous prime is 165419041. The next prime is 165419077. The reversal of 165419057 is 750914561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154654096 + 10764961 = 12436^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 165419057 - 2⁴ = 165419041 is a prime.

It is equal to p_9260975 and since 165419057 and 9260975 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165419057.

It is not a weakly prime, because it can be changed into another prime (165419017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82709528 + 82709529.

It is an arithmetic number, because the mean of its divisors is an integer number (82709529).

Almost surely, 2^165419057 is an apocalyptic number.

It is an amenable number.

165419057 is a deficient number, since it is larger than the sum of its proper divisors (1).

165419057 is an equidigital number, since it uses as much as digits as its factorization.

165419057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 165419057 is about 12861.5340064862. The cubic root of 165419057 is about 548.9445953446.

The spelling of 165419057 in words is "one hundred sixty-five million, four hundred nineteen thousand, fifty-seven".