657043023 has 64 divisors (see below), whose sum is σ = 1105477632. Its totient is φ = 337944960.

The previous prime is 657043021. The next prime is 657043061. The reversal of 657043023 is 320340756.

It is not a de Polignac number, because 657043023 - 2¹ = 657043021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657043021) 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 in 63 ways as a sum of consecutive naturals, for example, 2424378 + ... + 2424648.

It is an arithmetic number, because the mean of its divisors is an integer number (17273088).

Almost surely, 2^657043023 is an apocalyptic number.

657043023 is a deficient number, since it is larger than the sum of its proper divisors (448434609).

657043023 is a wasteful number, since it uses less digits than its factorization.

657043023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 15120, while the sum is 30.

The square root of 657043023 is about 25632.8504657598. The cubic root of 657043023 is about 869.3565608358.

Adding to 657043023 its reverse (320340756), we get a palindrome (977383779).

The spelling of 657043023 in words is "six hundred fifty-seven million, forty-three thousand, twenty-three".