13988501 has 4 divisors (see below), whose sum is σ = 14811372. Its totient is φ = 13165632.

The previous prime is 13988477. The next prime is 13988521. The reversal of 13988501 is 10588931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7150276 + 6838225 = 2674^2 + 2615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13988501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988521) 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 in 3 ways as a sum of consecutive naturals, for example, 411410 + ... + 411443.

It is an arithmetic number, because the mean of its divisors is an integer number (3702843).

Almost surely, 2^13988501 is an apocalyptic number.

It is an amenable number.

13988501 is a deficient number, since it is larger than the sum of its proper divisors (822871).

13988501 is an equidigital number, since it uses as much as digits as its factorization.

13988501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822870.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 13988501 is about 3740.1204526058. The cubic root of 13988501 is about 240.9482220910.

The spelling of 13988501 in words is "thirteen million, nine hundred eighty-eight thousand, five hundred one".