647757613 has 8 divisors (see below), whose sum is σ = 686121408. Its totient is φ = 609422784.

The previous prime is 647757587. The next prime is 647757623. The reversal of 647757613 is 316757746.

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 647757613 - 2¹⁷ = 647626541 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 (647757623) 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, 53370 + ... + 64372.

It is an arithmetic number, because the mean of its divisors is an integer number (85765176).

Almost surely, 2^647757613 is an apocalyptic number.

It is an amenable number.

647757613 is a deficient number, since it is larger than the sum of its proper divisors (38363795).

647757613 is a wasteful number, since it uses less digits than its factorization.

647757613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14483.

The product of its digits is 740880, while the sum is 46.

The square root of 647757613 is about 25451.0827471053. The cubic root of 647757613 is about 865.2418328810.

The spelling of 647757613 in words is "six hundred forty-seven million, seven hundred fifty-seven thousand, six hundred thirteen".