13613989 has 8 divisors (see below), whose sum is σ = 13874112. Its totient is φ = 13356000.

The previous prime is 13613987. The next prime is 13613993. The reversal of 13613989 is 98931631.

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

It is a cyclic number.

It is not a de Polignac number, because 13613989 - 2¹ = 13613987 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 (13613983) 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, 17952 + ... + 18694.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^13613989 is an apocalyptic number.

It is an amenable number.

13613989 is a deficient number, since it is larger than the sum of its proper divisors (260123).

13613989 is an equidigital number, since it uses as much as digits as its factorization.

13613989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067.

The product of its digits is 34992, while the sum is 40.

The square root of 13613989 is about 3689.7139455519. The cubic root of 13613989 is about 238.7784516955.

The spelling of 13613989 in words is "thirteen million, six hundred thirteen thousand, nine hundred eighty-nine".