647974574 has 32 divisors (see below), whose sum is σ = 1072598016. Its totient is φ = 291755520.

The previous prime is 647974573. The next prime is 647974583. The reversal of 647974574 is 475479746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647974573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199814 + ... + 203030.

It is an arithmetic number, because the mean of its divisors is an integer number (33518688).

Almost surely, 2^647974574 is an apocalyptic number.

647974574 is a deficient number, since it is larger than the sum of its proper divisors (424623442).

647974574 is a wasteful number, since it uses less digits than its factorization.

647974574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420.

The product of its digits is 5927040, while the sum is 53.

The square root of 647974574 is about 25455.3447040106. The cubic root of 647974574 is about 865.3384239384.

The spelling of 647974574 in words is "six hundred forty-seven million, nine hundred seventy-four thousand, five hundred seventy-four".