647987367 has 4 divisors (see below), whose sum is σ = 863983160. Its totient is φ = 431991576.

The previous prime is 647987341. The next prime is 647987369. The reversal of 647987367 is 763789746.

647987367 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 647987367 - 2⁷ = 647987239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647987369) 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, 107997892 + ... + 107997897.

It is an arithmetic number, because the mean of its divisors is an integer number (215995790).

Almost surely, 2^647987367 is an apocalyptic number.

647987367 is a deficient number, since it is larger than the sum of its proper divisors (215995793).

647987367 is a wasteful number, since it uses less digits than its factorization.

647987367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215995792.

The product of its digits is 10668672, while the sum is 57.

The square root of 647987367 is about 25455.5959859517. The cubic root of 647987367 is about 865.3441187100.

The spelling of 647987367 in words is "six hundred forty-seven million, nine hundred eighty-seven thousand, three hundred sixty-seven".