647116938 has 40 divisors (see below), whose sum is σ = 1561566468. Its totient is φ = 199112256.

The previous prime is 647116919. The next prime is 647116957. The reversal of 647116938 is 839611746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (647116919) and next prime (647116957).

It can be written as a sum of positive squares in 2 ways, for example, as 584817489 + 62299449 = 24183^2 + 7893^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647116893 and 647116902.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 151531 + ... + 155742.

Almost surely, 2^647116938 is an apocalyptic number.

647116938 is an abundant number, since it is smaller than the sum of its proper divisors (914449530).

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

647116938 is a wasteful number, since it uses less digits than its factorization.

647116938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307300 (or 307291 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 647116938 is about 25438.4932336803. The cubic root of 647116938 is about 864.9564783698.

It can be divided in two parts, 6471 and 16938, that added together give a square (23409 = 153²).

The spelling of 647116938 in words is "six hundred forty-seven million, one hundred sixteen thousand, nine hundred thirty-eight".