8013989 has 2 divisors, whose sum is σ = 8013990. Its totient is φ = 8013988.

The previous prime is 8013977. The next prime is 8014001. The reversal of 8013989 is 9893108.

It is a balanced prime because it is at equal distance from previous prime (8013977) and next prime (8014001).

It can be written as a sum of positive squares in only one way, i.e., 4133089 + 3880900 = 2033^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 8013989 - 2¹² = 8009893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8013949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4006994 + 4006995.

It is an arithmetic number, because the mean of its divisors is an integer number (4006995).

Almost surely, 2^8013989 is an apocalyptic number.

It is an amenable number.

8013989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8013989 is an equidigital number, since it uses as much as digits as its factorization.

8013989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 8013989 is about 2830.8989738244. The cubic root of 8013989 is about 200.1165071173.

The spelling of 8013989 in words is "eight million, thirteen thousand, nine hundred eighty-nine".