2013989 has 2 divisors, whose sum is σ = 2013990. Its totient is φ = 2013988.

The previous prime is 2013983. The next prime is 2014009. The reversal of 2013989 is 9893102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1481089 + 532900 = 1217^2 + 730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013989 is a prime.

It is equal to p₁₄₉₉₀₉ and since 2013989 and 149909 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013983) 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 as a sum of consecutive naturals, namely, 1006994 + 1006995.

It is an arithmetic number, because the mean of its divisors is an integer number (1006995).

2^2013989 is an apocalyptic number.

It is an amenable number.

2013989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013989 is an equidigital number, since it uses as much as digits as its factorization.

2013989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2013989 is about 1419.1508024167. The cubic root of 2013989 is about 126.2851733517.

The spelling of 2013989 in words is "two million, thirteen thousand, nine hundred eighty-nine".