2559989 has 2 divisors, whose sum is σ = 2559990. Its totient is φ = 2559988.

The previous prime is 2559983. The next prime is 2560021. The reversal of 2559989 is 9899552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 339889 = 1490^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 2559989 - 2¹² = 2555893 is a prime.

It is a d-powerful number, because it can be written as 2¹⁶ + 5² + 5⁸ + 9 + 9² + 8⁷ + 9⁴ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2559983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279994 + 1279995.

It is an arithmetic number, because the mean of its divisors is an integer number (1279995).

2^2559989 is an apocalyptic number.

It is an amenable number.

2559989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2559989 is an equidigital number, since it uses as much as digits as its factorization.

2559989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 47.

The square root of 2559989 is about 1599.9965624963. The cubic root of 2559989 is about 136.7978797991.

The spelling of 2559989 in words is "two million, five hundred fifty-nine thousand, nine hundred eighty-nine".