16691253 has 16 divisors (see below), whose sum is σ = 23662080. Its totient is φ = 10435824.

The previous prime is 16691243. The next prime is 16691281. The reversal of 16691253 is 35219661.

It is a happy number.

It is not a de Polignac number, because 16691253 - 2⁵ = 16691221 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16691243) 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, 4450 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (1478880).

Almost surely, 2^16691253 is an apocalyptic number.

It is an amenable number.

16691253 is a deficient number, since it is larger than the sum of its proper divisors (6970827).

16691253 is a wasteful number, since it uses less digits than its factorization.

16691253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968.

The product of its digits is 9720, while the sum is 33.

The square root of 16691253 is about 4085.4929935076. The cubic root of 16691253 is about 255.5620206794.

It can be divided in two parts, 166 and 91253, that added together give a palindrome (91419).

The spelling of 16691253 in words is "sixteen million, six hundred ninety-one thousand, two hundred fifty-three".