16813399 has 2 divisors, whose sum is σ = 16813400. Its totient is φ = 16813398.

The previous prime is 16813373. The next prime is 16813453. The reversal of 16813399 is 99331861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16813399 - 2⁵ = 16813367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16813319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406699 + 8406700.

It is an arithmetic number, because the mean of its divisors is an integer number (8406700).

Almost surely, 2^16813399 is an apocalyptic number.

16813399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16813399 is an equidigital number, since it uses as much as digits as its factorization.

16813399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 16813399 is about 4100.4144912435. The cubic root of 16813399 is about 256.1839041111.

The spelling of 16813399 in words is "sixteen million, eight hundred thirteen thousand, three hundred ninety-nine".