13249999 has 4 divisors (see below), whose sum is σ = 15142864. Its totient is φ = 11357136.

The previous prime is 13249997. The next prime is 13250009. The reversal of 13249999 is 99994231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13249999 - 2¹ = 13249997 is a prime.

It is a Duffinian number.

13249999 is a modest number, since divided by 9999 gives 1324 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13249997) 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, 946422 + ... + 946435.

It is an arithmetic number, because the mean of its divisors is an integer number (3785716).

Almost surely, 2^13249999 is an apocalyptic number.

13249999 is a deficient number, since it is larger than the sum of its proper divisors (1892865).

13249999 is an equidigital number, since it uses as much as digits as its factorization.

13249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892864.

The product of its digits is 157464, while the sum is 46.

The square root of 13249999 is about 3640.0548072797. The cubic root of 13249999 is about 236.6311686052.

The spelling of 13249999 in words is "thirteen million, two hundred forty-nine thousand, nine hundred ninety-nine".