657423577 has 4 divisors (see below), whose sum is σ = 666683136. Its totient is φ = 648164020.

The previous prime is 657423563. The next prime is 657423583. The reversal of 657423577 is 775324756.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 657423577 - 2⁷ = 657423449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657423587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4629673 + ... + 4629814.

It is an arithmetic number, because the mean of its divisors is an integer number (166670784).

Almost surely, 2^657423577 is an apocalyptic number.

It is an amenable number.

657423577 is a deficient number, since it is larger than the sum of its proper divisors (9259559).

657423577 is an equidigital number, since it uses as much as digits as its factorization.

657423577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259558.

The product of its digits is 1234800, while the sum is 46.

The square root of 657423577 is about 25640.2725609538. The cubic root of 657423577 is about 869.5243698696.

The spelling of 657423577 in words is "six hundred fifty-seven million, four hundred twenty-three thousand, five hundred seventy-seven".