657672413 has 4 divisors (see below), whose sum is σ = 658179228. Its totient is φ = 657165600.

The previous prime is 657672341. The next prime is 657672427. The reversal of 657672413 is 314276756.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8543929 + 649128484 = 2923^2 + 25478^2 .

It is a cyclic number.

It is not a de Polignac number, because 657672413 - 2²⁸ = 389236957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657677413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251456 + ... + 254057.

It is an arithmetic number, because the mean of its divisors is an integer number (164544807).

Almost surely, 2^657672413 is an apocalyptic number.

It is an amenable number.

657672413 is a deficient number, since it is larger than the sum of its proper divisors (506815).

657672413 is a wasteful number, since it uses less digits than its factorization.

657672413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506814.

The product of its digits is 211680, while the sum is 41.

The square root of 657672413 is about 25645.1245463928. The cubic root of 657672413 is about 869.6340615411.

The spelling of 657672413 in words is "six hundred fifty-seven million, six hundred seventy-two thousand, four hundred thirteen".