657374489 has 2 divisors, whose sum is σ = 657374490. Its totient is φ = 657374488.

The previous prime is 657374353. The next prime is 657374503. The reversal of 657374489 is 984473756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336355600 + 321018889 = 18340^2 + 17917^2 .

It is a cyclic number.

It is not a de Polignac number, because 657374489 - 2¹² = 657370393 is a prime.

It is a super-2 number, since 2×657374489² = 864282437576022242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 657374489.

It is not a weakly prime, because it can be changed into another prime (657374789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328687244 + 328687245.

It is an arithmetic number, because the mean of its divisors is an integer number (328687245).

Almost surely, 2^657374489 is an apocalyptic number.

It is an amenable number.

657374489 is a deficient number, since it is larger than the sum of its proper divisors (1).

657374489 is an equidigital number, since it uses as much as digits as its factorization.

657374489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 53.

The square root of 657374489 is about 25639.3152989701. The cubic root of 657374489 is about 869.5027276711.

The spelling of 657374489 in words is "six hundred fifty-seven million, three hundred seventy-four thousand, four hundred eighty-nine".