647538922 has 8 divisors (see below), whose sum is σ = 971654400. Its totient is φ = 323654124.

The previous prime is 647538919. The next prime is 647538989. The reversal of 647538922 is 229835746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50472 + ... + 61987.

It is an arithmetic number, because the mean of its divisors is an integer number (121456800).

Almost surely, 2^647538922 is an apocalyptic number.

647538922 is a deficient number, since it is larger than the sum of its proper divisors (324115478).

647538922 is a wasteful number, since it uses less digits than its factorization.

647538922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115340.

The product of its digits is 725760, while the sum is 46.

The square root of 647538922 is about 25446.7860839046. The cubic root of 647538922 is about 865.1444497980.

The spelling of 647538922 in words is "six hundred forty-seven million, five hundred thirty-eight thousand, nine hundred twenty-two".