16691013 has 12 divisors (see below), whose sum is σ = 24150828. Its totient is φ = 11108160.

The previous prime is 16690997. The next prime is 16691023. The reversal of 16691013 is 31019661.

It can be written as a sum of positive squares in 2 ways, for example, as 6749604 + 9941409 = 2598^2 + 3153^2 .

It is not a de Polignac number, because 16691013 - 2⁴ = 16690997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16691023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5631 + ... + 8067.

It is an arithmetic number, because the mean of its divisors is an integer number (2012569).

Almost surely, 2^16691013 is an apocalyptic number.

It is an amenable number.

16691013 is a deficient number, since it is larger than the sum of its proper divisors (7459815).

16691013 is a wasteful number, since it uses less digits than its factorization.

16691013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3201 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 16691013 is about 4085.4636211818. The cubic root of 16691013 is about 255.5607957828.

The spelling of 16691013 in words is "sixteen million, six hundred ninety-one thousand, thirteen".