647312124 has 12 divisors (see below), whose sum is σ = 1510394984. Its totient is φ = 215770704.

The previous prime is 647312117. The next prime is 647312129. The reversal of 647312124 is 421213746.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 647312091 and 647312100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647312129) 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, 26971327 + ... + 26971350.

Almost surely, 2^647312124 is an apocalyptic number.

It is an amenable number.

647312124 is an abundant number, since it is smaller than the sum of its proper divisors (863082860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647312124 is a wasteful number, since it uses less digits than its factorization.

647312124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53942684 (or 53942682 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 647312124 is about 25442.3293744893. The cubic root of 647312124 is about 865.0434335058.

The spelling of 647312124 in words is "six hundred forty-seven million, three hundred twelve thousand, one hundred twenty-four".