13901989 has 4 divisors (see below), whose sum is σ = 14197824. Its totient is φ = 13606156.

The previous prime is 13901957. The next prime is 13901999. The reversal of 13901989 is 98910931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13901989 - 2⁵ = 13901957 is a prime.

It is a super-2 number, since 2×13901989² = 386530596312242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13901929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147847 + ... + 147940.

It is an arithmetic number, because the mean of its divisors is an integer number (3549456).

Almost surely, 2^13901989 is an apocalyptic number.

It is an amenable number.

13901989 is a deficient number, since it is larger than the sum of its proper divisors (295835).

13901989 is an equidigital number, since it uses as much as digits as its factorization.

13901989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295834.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 13901989 is about 3728.5371125952. The cubic root of 13901989 is about 240.4504791547.

The spelling of 13901989 in words is "thirteen million, nine hundred one thousand, nine hundred eighty-nine".