653421337 has 4 divisors (see below), whose sum is σ = 654069940. Its totient is φ = 652772736.

The previous prime is 653421289. The next prime is 653421341. The reversal of 653421337 is 733124356.

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 380874256 + 272547081 = 19516^2 + 16509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653421337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653421397) 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, 322788 + ... + 324805.

It is an arithmetic number, because the mean of its divisors is an integer number (163517485).

Almost surely, 2^653421337 is an apocalyptic number.

It is an amenable number.

653421337 is a deficient number, since it is larger than the sum of its proper divisors (648603).

653421337 is a wasteful number, since it uses less digits than its factorization.

653421337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648602.

The product of its digits is 45360, while the sum is 34.

The square root of 653421337 is about 25562.1074444186. The cubic root of 653421337 is about 867.7562905490.

The spelling of 653421337 in words is "six hundred fifty-three million, four hundred twenty-one thousand, three hundred thirty-seven".