16313643 has 10 divisors (see below), whose sum is σ = 24369884. Its totient is φ = 10875708.

The previous prime is 16313639. The next prime is 16313663. The reversal of 16313643 is 34631361.

16313643 is a `hidden beast` number, since 1 + 6 + 3 + 13 + 643 = 666.

It is not a de Polignac number, because 16313643 - 2² = 16313639 is a prime.

It is a super-2 number, since 2×16313643² = 532269895862898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16313603) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 100621 + ... + 100782.

Almost surely, 2^16313643 is an apocalyptic number.

16313643 is a deficient number, since it is larger than the sum of its proper divisors (8056241).

16313643 is an equidigital number, since it uses as much as digits as its factorization.

16313643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201415 (or 201406 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 16313643 is about 4039.0151027200. The cubic root of 16313643 is about 253.6200894550.

The spelling of 16313643 in words is "sixteen million, three hundred thirteen thousand, six hundred forty-three".