647792387 has 8 divisors (see below), whose sum is σ = 707762880. Its totient is φ = 588001960.

The previous prime is 647792363. The next prime is 647792393. The reversal of 647792387 is 783297746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 647792387 - 2¹⁰ = 647791363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647792347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37433 + ... + 51930.

It is an arithmetic number, because the mean of its divisors is an integer number (88470360).

Almost surely, 2^647792387 is an apocalyptic number.

647792387 is a deficient number, since it is larger than the sum of its proper divisors (59970493).

647792387 is a wasteful number, since it uses less digits than its factorization.

647792387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90033.

The product of its digits is 3556224, while the sum is 53.

The square root of 647792387 is about 25451.7658915840. The cubic root of 647792387 is about 865.2573157203.

The spelling of 647792387 in words is "six hundred forty-seven million, seven hundred ninety-two thousand, three hundred eighty-seven".