13249979 has 4 divisors (see below), whose sum is σ = 13259400. Its totient is φ = 13240560.

The previous prime is 13249967. The next prime is 13249997. The reversal of 13249979 is 97994231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13249979 - 2¹⁶ = 13184443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13249879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (3314850).

Almost surely, 2^13249979 is an apocalyptic number.

13249979 is a deficient number, since it is larger than the sum of its proper divisors (9421).

13249979 is an equidigital number, since it uses as much as digits as its factorization.

13249979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420.

The product of its digits is 122472, while the sum is 44.

The square root of 13249979 is about 3640.0520600673. The cubic root of 13249979 is about 236.6310495454.

The spelling of 13249979 in words is "thirteen million, two hundred forty-nine thousand, nine hundred seventy-nine".