13900649 has 8 divisors (see below), whose sum is σ = 15924480. Its totient is φ = 11886336.

The previous prime is 13900637. The next prime is 13900651. The reversal of 13900649 is 94600931.

13900649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13900649 - 2⁴ = 13900633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13900669) 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, 1097 + ... + 5385.

It is an arithmetic number, because the mean of its divisors is an integer number (1990560).

Almost surely, 2^13900649 is an apocalyptic number.

It is an amenable number.

13900649 is a deficient number, since it is larger than the sum of its proper divisors (2023831).

13900649 is an equidigital number, since it uses as much as digits as its factorization.

13900649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 13900649 is about 3728.3574131244. The cubic root of 13900649 is about 240.4427533059.

The spelling of 13900649 in words is "thirteen million, nine hundred thousand, six hundred forty-nine".