13990651 has 4 divisors (see below), whose sum is σ = 14007312. Its totient is φ = 13973992.

The previous prime is 13990637. The next prime is 13990657. The reversal of 13990651 is 15609931.

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

It is a cyclic number.

It is not a de Polignac number, because 13990651 - 2¹⁷ = 13859579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13990657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7000 + ... + 8773.

It is an arithmetic number, because the mean of its divisors is an integer number (3501828).

Almost surely, 2^13990651 is an apocalyptic number.

13990651 is a deficient number, since it is larger than the sum of its proper divisors (16661).

13990651 is an equidigital number, since it uses as much as digits as its factorization.

13990651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16660.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 13990651 is about 3740.4078654607. The cubic root of 13990651 is about 240.9605658520.

It can be divided in two parts, 13990 and 651, that added together give a palindrome (14641).

The spelling of 13990651 in words is "thirteen million, nine hundred ninety thousand, six hundred fifty-one".