164608657 has 2 divisors, whose sum is σ = 164608658. Its totient is φ = 164608656.

The previous prime is 164608607. The next prime is 164608673. The reversal of 164608657 is 756806461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164249856 + 358801 = 12816^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 164608657 - 2⁷ = 164608529 is a prime.

It is not a weakly prime, because it can be changed into another prime (164608607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82304328 + 82304329.

It is an arithmetic number, because the mean of its divisors is an integer number (82304329).

Almost surely, 2^164608657 is an apocalyptic number.

It is an amenable number.

164608657 is a deficient number, since it is larger than the sum of its proper divisors (1).

164608657 is an equidigital number, since it uses as much as digits as its factorization.

164608657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 164608657 is about 12829.9905300043. The cubic root of 164608657 is about 548.0466875970.

The spelling of 164608657 in words is "one hundred sixty-four million, six hundred eight thousand, six hundred fifty-seven".