657422473 has 4 divisors (see below), whose sum is σ = 657830160. Its totient is φ = 657014788.

The previous prime is 657422471. The next prime is 657422483. The reversal of 657422473 is 374224756.

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 657422473 - 2¹ = 657422471 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (657422471) 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, 201415 + ... + 204652.

It is an arithmetic number, because the mean of its divisors is an integer number (164457540).

Almost surely, 2^657422473 is an apocalyptic number.

It is an amenable number.

657422473 is a deficient number, since it is larger than the sum of its proper divisors (407687).

657422473 is a wasteful number, since it uses less digits than its factorization.

657422473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407686.

The product of its digits is 282240, while the sum is 40.

The square root of 657422473 is about 25640.2510323125. The cubic root of 657422473 is about 869.5238831436.

The spelling of 657422473 in words is "six hundred fifty-seven million, four hundred twenty-two thousand, four hundred seventy-three".