653772974 has 4 divisors (see below), whose sum is σ = 980659464. Its totient is φ = 326886486.

The previous prime is 653772949. The next prime is 653772983. The reversal of 653772974 is 479277356.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163443242 + ... + 163443245.

It is an arithmetic number, because the mean of its divisors is an integer number (245164866).

Almost surely, 2^653772974 is an apocalyptic number.

653772974 is a deficient number, since it is larger than the sum of its proper divisors (326886490).

653772974 is a wasteful number, since it uses less digits than its factorization.

653772974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326886489.

The product of its digits is 2222640, while the sum is 50.

The square root of 653772974 is about 25568.9846102656. The cubic root of 653772974 is about 867.9119229013.

The spelling of 653772974 in words is "six hundred fifty-three million, seven hundred seventy-two thousand, nine hundred seventy-four".