13649399 has 2 divisors, whose sum is σ = 13649400. Its totient is φ = 13649398.

The previous prime is 13649381. The next prime is 13649407. The reversal of 13649399 is 99394631.

13649399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13649399 - 2²⁰ = 12600823 is a prime.

It is a super-2 number, since 2×13649399² = 372612186122402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13649359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6824699 + 6824700.

It is an arithmetic number, because the mean of its divisors is an integer number (6824700).

Almost surely, 2^13649399 is an apocalyptic number.

13649399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13649399 is an equidigital number, since it uses as much as digits as its factorization.

13649399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 13649399 is about 3694.5093043596. The cubic root of 13649399 is about 238.9852934702.

The spelling of 13649399 in words is "thirteen million, six hundred forty-nine thousand, three hundred ninety-nine".