165579457 has 2 divisors, whose sum is σ = 165579458. Its totient is φ = 165579456.

The previous prime is 165579451. The next prime is 165579467. The reversal of 165579457 is 754975561.

165579457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160757041 + 4822416 = 12679^2 + 2196^2 .

It is an emirp because it is prime and its reverse (754975561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165579457 - 2¹¹ = 165577409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165579457.

It is not a weakly prime, because it can be changed into another prime (165579451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82789728 + 82789729.

It is an arithmetic number, because the mean of its divisors is an integer number (82789729).

Almost surely, 2^165579457 is an apocalyptic number.

It is an amenable number.

165579457 is a deficient number, since it is larger than the sum of its proper divisors (1).

165579457 is an equidigital number, since it uses as much as digits as its factorization.

165579457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1323000, while the sum is 49.

The square root of 165579457 is about 12867.7681436992. The cubic root of 165579457 is about 549.1219676303.

The spelling of 165579457 in words is "one hundred sixty-five million, five hundred seventy-nine thousand, four hundred fifty-seven".