13991235 has 8 divisors (see below), whose sum is σ = 22386000. Its totient is φ = 7461984.

The previous prime is 13991233. The next prime is 13991251. The reversal of 13991235 is 53219931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13991235 - 2¹ = 13991233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13991196 and 13991205.

It is not an unprimeable number, because it can be changed into a prime (13991231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466360 + ... + 466389.

It is an arithmetic number, because the mean of its divisors is an integer number (2798250).

Almost surely, 2^13991235 is an apocalyptic number.

13991235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13991235 is a deficient number, since it is larger than the sum of its proper divisors (8394765).

13991235 is an equidigital number, since it uses as much as digits as its factorization.

13991235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932757.

The product of its digits is 7290, while the sum is 33.

The square root of 13991235 is about 3740.4859309988. The cubic root of 13991235 is about 240.9639185436.

The spelling of 13991235 in words is "thirteen million, nine hundred ninety-one thousand, two hundred thirty-five".