16993807 has 6 divisors (see below), whose sum is σ = 17280744. Its totient is φ = 16711560.

The previous prime is 16993799. The next prime is 16993817. The reversal of 16993807 is 70839961.

It is not a de Polignac number, because 16993807 - 2³ = 16993799 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 (16993817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1438 + ... + 6004.

It is an arithmetic number, because the mean of its divisors is an integer number (2880124).

Almost surely, 2^16993807 is an apocalyptic number.

16993807 is a deficient number, since it is larger than the sum of its proper divisors (286937).

16993807 is an frugal number, since it uses more digits than its factorization.

16993807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4689 (or 4628 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 16993807 is about 4122.3545456450. The cubic root of 16993807 is about 257.0969318483.

The spelling of 16993807 in words is "sixteen million, nine hundred ninety-three thousand, eight hundred seven".