16307813 has 4 divisors (see below), whose sum is σ = 16316448. Its totient is φ = 16299180.

The previous prime is 16307803. The next prime is 16307839. The reversal of 16307813 is 31870361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16307813 - 2⁶ = 16307749 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 (16307803) 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, 131 + ... + 5712.

It is an arithmetic number, because the mean of its divisors is an integer number (4079112).

Almost surely, 2^16307813 is an apocalyptic number.

It is an amenable number.

16307813 is a deficient number, since it is larger than the sum of its proper divisors (8635).

16307813 is an equidigital number, since it uses as much as digits as its factorization.

16307813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8634.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 16307813 is about 4038.2933276324. The cubic root of 16307813 is about 253.5898738191.

The spelling of 16307813 in words is "sixteen million, three hundred seven thousand, eight hundred thirteen".