11699172 has 18 divisors (see below), whose sum is σ = 29572998. Its totient is φ = 3899712.

The previous prime is 11699161. The next prime is 11699173. The reversal of 11699172 is 27199611.

It can be written as a sum of positive squares in only one way, i.e., 8856576 + 2842596 = 2976^2 + 1686^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 324977 = 11699172 / (1 + 1 + 6 + 9 + 9 + 1 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (11699173) 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, 162453 + ... + 162524.

Almost surely, 2^11699172 is an apocalyptic number.

11699172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11699172 is an abundant number, since it is smaller than the sum of its proper divisors (17873826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11699172 is a wasteful number, since it uses less digits than its factorization.

11699172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324987 (or 324982 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 11699172 is about 3420.4052391493. The cubic root of 11699172 is about 227.0135126217.

The spelling of 11699172 in words is "eleven million, six hundred ninety-nine thousand, one hundred seventy-two".