647315311 has 4 divisors (see below), whose sum is σ = 651057192. Its totient is φ = 643573432.

The previous prime is 647315303. The next prime is 647315321. The reversal of 647315311 is 113513746.

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

It is a cyclic number.

It is not a de Polignac number, because 647315311 - 2³ = 647315303 is a prime.

It is a super-2 number, since 2×647315311² = 838034223710053442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647315321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870681 + ... + 1871026.

It is an arithmetic number, because the mean of its divisors is an integer number (162764298).

Almost surely, 2^647315311 is an apocalyptic number.

647315311 is a deficient number, since it is larger than the sum of its proper divisors (3741881).

647315311 is a wasteful number, since it uses less digits than its factorization.

647315311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3741880.

The product of its digits is 7560, while the sum is 31.

The square root of 647315311 is about 25442.3920062560. The cubic root of 647315311 is about 865.0448531655.

The spelling of 647315311 in words is "six hundred forty-seven million, three hundred fifteen thousand, three hundred eleven".