13575991 has 16 divisors (see below), whose sum is σ = 16087680. Its totient is φ = 11293920.

The previous prime is 13575983. The next prime is 13576007. The reversal of 13575991 is 19957531.

It is not a de Polignac number, because 13575991 - 2³ = 13575983 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 (13575491) 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, 19536 + ... + 20218.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^13575991 is an apocalyptic number.

13575991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13575991 is a deficient number, since it is larger than the sum of its proper divisors (2511689).

13575991 is a wasteful number, since it uses less digits than its factorization.

13575991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its digits is 42525, while the sum is 40.

The square root of 13575991 is about 3684.5611679005. The cubic root of 13575991 is about 238.5560932074.

The spelling of 13575991 in words is "thirteen million, five hundred seventy-five thousand, nine hundred ninety-one".