647312104 has 8 divisors (see below), whose sum is σ = 1213710210. Its totient is φ = 323656048.

The previous prime is 647312101. The next prime is 647312117. The reversal of 647312104 is 401213746.

It can be written as a sum of positive squares in only one way, i.e., 396089604 + 251222500 = 19902^2 + 15850^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (647312101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40456999 + ... + 40457014.

Almost surely, 2^647312104 is an apocalyptic number.

It is an amenable number.

647312104 is a deficient number, since it is larger than the sum of its proper divisors (566398106).

647312104 is a wasteful number, since it uses less digits than its factorization.

647312104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80914019 (or 80914015 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 647312104 is about 25442.3289814435. The cubic root of 647312104 is about 865.0434245967.

The spelling of 647312104 in words is "six hundred forty-seven million, three hundred twelve thousand, one hundred four".