165628457 has 2 divisors, whose sum is σ = 165628458. Its totient is φ = 165628456.

The previous prime is 165628417. The next prime is 165628469. The reversal of 165628457 is 754826561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165353881 + 274576 = 12859^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 165628457 - 2¹⁰ = 165627433 is a prime.

It is not a weakly prime, because it can be changed into another prime (165628417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82814228 + 82814229.

It is an arithmetic number, because the mean of its divisors is an integer number (82814229).

Almost surely, 2^165628457 is an apocalyptic number.

It is an amenable number.

165628457 is a deficient number, since it is larger than the sum of its proper divisors (1).

165628457 is an equidigital number, since it uses as much as digits as its factorization.

165628457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 165628457 is about 12869.6719849420. The cubic root of 165628457 is about 549.1761295881.

The spelling of 165628457 in words is "one hundred sixty-five million, six hundred twenty-eight thousand, four hundred fifty-seven".