653279871 has 4 divisors (see below), whose sum is σ = 871039832. Its totient is φ = 435519912.

The previous prime is 653279863. The next prime is 653279903. The reversal of 653279871 is 178972356.

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

It is not a de Polignac number, because 653279871 - 2³ = 653279863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 653279871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653279821) 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, 108879976 + ... + 108879981.

It is an arithmetic number, because the mean of its divisors is an integer number (217759958).

Almost surely, 2^653279871 is an apocalyptic number.

653279871 is a deficient number, since it is larger than the sum of its proper divisors (217759961).

653279871 is a wasteful number, since it uses less digits than its factorization.

653279871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217759960.

The product of its digits is 635040, while the sum is 48.

The square root of 653279871 is about 25559.3401910143. The cubic root of 653279871 is about 867.6936628260.

The spelling of 653279871 in words is "six hundred fifty-three million, two hundred seventy-nine thousand, eight hundred seventy-one".