16396813 has 4 divisors (see below), whose sum is σ = 16412188. Its totient is φ = 16381440.

The previous prime is 16396801. The next prime is 16396817. The reversal of 16396813 is 31869361.

16396813 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 can be written as a sum of positive squares in 2 ways, for example, as 12124324 + 4272489 = 3482^2 + 2067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16396813 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 (16396817) 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, 5958 + ... + 8263.

It is an arithmetic number, because the mean of its divisors is an integer number (4103047).

Almost surely, 2^16396813 is an apocalyptic number.

It is an amenable number.

16396813 is a deficient number, since it is larger than the sum of its proper divisors (15375).

16396813 is a wasteful number, since it uses less digits than its factorization.

16396813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15374.

The product of its digits is 23328, while the sum is 37.

The square root of 16396813 is about 4049.2978403669. The cubic root of 16396813 is about 254.0503599487.

The spelling of 16396813 in words is "sixteen million, three hundred ninety-six thousand, eight hundred thirteen".