646462727 has 4 divisors (see below), whose sum is σ = 650428920. Its totient is φ = 642496536.

The previous prime is 646462697. The next prime is 646462741. The reversal of 646462727 is 727264646.

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 646462727 - 2⁸ = 646462471 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 (646462777) 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 3 ways as a sum of consecutive naturals, for example, 1982852 + ... + 1983177.

It is an arithmetic number, because the mean of its divisors is an integer number (162607230).

Almost surely, 2^646462727 is an apocalyptic number.

646462727 is a deficient number, since it is larger than the sum of its proper divisors (3966193).

646462727 is a wasteful number, since it uses less digits than its factorization.

646462727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966192.

The product of its digits is 677376, while the sum is 44.

The square root of 646462727 is about 25425.6312999304. The cubic root of 646462727 is about 864.6649005494.

The spelling of 646462727 in words is "six hundred forty-six million, four hundred sixty-two thousand, seven hundred twenty-seven".