13902649 has 12 divisors (see below), whose sum is σ = 14911092. Its totient is φ = 12953600.

The previous prime is 13902611. The next prime is 13902653. The reversal of 13902649 is 94620931.

It can be written as a sum of positive squares in 2 ways, for example, as 6285049 + 7617600 = 2507^2 + 2760^2 .

It is not a de Polignac number, because 13902649 - 2¹⁷ = 13771577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13902689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21369 + ... + 22009.

It is an arithmetic number, because the mean of its divisors is an integer number (1242591).

Almost surely, 2^13902649 is an apocalyptic number.

It is an amenable number.

13902649 is a deficient number, since it is larger than the sum of its proper divisors (1008443).

13902649 is an equidigital number, since it uses as much as digits as its factorization.

13902649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 13902649 is about 3728.6256181065. The cubic root of 13902649 is about 240.4542842410.

The spelling of 13902649 in words is "thirteen million, nine hundred two thousand, six hundred forty-nine".