657012023 has 16 divisors (see below), whose sum is σ = 696038400. Its totient is φ = 619231200.

The previous prime is 657012017. The next prime is 657012067. The reversal of 657012023 is 320210756.

It is not a de Polignac number, because 657012023 - 2⁶ = 657011959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657011983 and 657012001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657072023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257090 + ... + 259632.

It is an arithmetic number, because the mean of its divisors is an integer number (43502400).

Almost surely, 2^657012023 is an apocalyptic number.

657012023 is a deficient number, since it is larger than the sum of its proper divisors (39026377).

657012023 is a wasteful number, since it uses less digits than its factorization.

657012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 657012023 is about 25632.2457658318. The cubic root of 657012023 is about 869.3428882268.

Adding to 657012023 its reverse (320210756), we get a palindrome (977222779).

The spelling of 657012023 in words is "six hundred fifty-seven million, twelve thousand, twenty-three".