647388099 has 8 divisors (see below), whose sum is σ = 959093520. Its totient is φ = 431592048.

The previous prime is 647388089. The next prime is 647388109. The reversal of 647388099 is 990883746.

647388099 is a `hidden beast` number, since 6 + 473 + 8 + 80 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (647388089) and next prime (647388109).

It is not a de Polignac number, because 647388099 - 2²⁸ = 378952643 is a prime.

It is a super-2 number, since 2×647388099² = 838222701453667602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (647388019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11988642 + ... + 11988695.

It is an arithmetic number, because the mean of its divisors is an integer number (119886690).

Almost surely, 2^647388099 is an apocalyptic number.

647388099 is a deficient number, since it is larger than the sum of its proper divisors (311705421).

647388099 is a wasteful number, since it uses less digits than its factorization.

647388099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23977346 (or 23977340 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 647388099 is about 25443.8224133089. The cubic root of 647388099 is about 865.0772755537.

The spelling of 647388099 in words is "six hundred forty-seven million, three hundred eighty-eight thousand, ninety-nine".