164989457 has 2 divisors, whose sum is σ = 164989458. Its totient is φ = 164989456.

The previous prime is 164989423. The next prime is 164989469. The reversal of 164989457 is 754989461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163814401 + 1175056 = 12799^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 164989457 - 2⁶ = 164989393 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164989399 and 164989408.

It is not a weakly prime, because it can be changed into another prime (164989057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82494728 + 82494729.

It is an arithmetic number, because the mean of its divisors is an integer number (82494729).

Almost surely, 2^164989457 is an apocalyptic number.

It is an amenable number.

164989457 is a deficient number, since it is larger than the sum of its proper divisors (1).

164989457 is an equidigital number, since it uses as much as digits as its factorization.

164989457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 164989457 is about 12844.8221863909. The cubic root of 164989457 is about 548.4689729105.

The spelling of 164989457 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, four hundred fifty-seven".