2615989 has 2 divisors, whose sum is σ = 2615990. Its totient is φ = 2615988.

The previous prime is 2615983. The next prime is 2615999. The reversal of 2615989 is 9895162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 562500 = 1433^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2615989 - 2³ = 2615981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2615981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1307994 + 1307995.

It is an arithmetic number, because the mean of its divisors is an integer number (1307995).

2^2615989 is an apocalyptic number.

It is an amenable number.

2615989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2615989 is an equidigital number, since it uses as much as digits as its factorization.

2615989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 2615989 is about 1617.4019290207. The cubic root of 2615989 is about 137.7881823616.

The spelling of 2615989 in words is "two million, six hundred fifteen thousand, nine hundred eighty-nine".