16139893 has 16 divisors (see below), whose sum is σ = 20252160. Its totient is φ = 12495600.

The previous prime is 16139887. The next prime is 16139897. The reversal of 16139893 is 39893161.

It is a cyclic number.

It is not a de Polignac number, because 16139893 - 2⁵ = 16139861 is a prime.

It is a super-2 number, since 2×16139893² = 520992292102898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16139897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13198 + ... + 14368.

It is an arithmetic number, because the mean of its divisors is an integer number (1265760).

Almost surely, 2^16139893 is an apocalyptic number.

It is an amenable number.

16139893 is a deficient number, since it is larger than the sum of its proper divisors (4112267).

16139893 is a wasteful number, since it uses less digits than its factorization.

16139893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

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

The square root of 16139893 is about 4017.4485684325. The cubic root of 16139893 is about 252.7164722060.

The spelling of 16139893 in words is "sixteen million, one hundred thirty-nine thousand, eight hundred ninety-three".