653631879 has 4 divisors (see below), whose sum is σ = 871509176. Its totient is φ = 435754584.

The previous prime is 653631877. The next prime is 653631883. The reversal of 653631879 is 978136356.

It is a happy number.

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

It is not a de Polignac number, because 653631879 - 2¹ = 653631877 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 (653631877) 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, 108938644 + ... + 108938649.

It is an arithmetic number, because the mean of its divisors is an integer number (217877294).

Almost surely, 2^653631879 is an apocalyptic number.

653631879 is a deficient number, since it is larger than the sum of its proper divisors (217877297).

653631879 is a wasteful number, since it uses less digits than its factorization.

653631879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217877296.

The product of its digits is 816480, while the sum is 48.

The square root of 653631879 is about 25566.2253569040. The cubic root of 653631879 is about 867.8494818358.

The spelling of 653631879 in words is "six hundred fifty-three million, six hundred thirty-one thousand, eight hundred seventy-nine".