2664989 has 2 divisors, whose sum is σ = 2664990. Its totient is φ = 2664988.

The previous prime is 2664967. The next prime is 2665001. The reversal of 2664989 is 9894662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2220100 + 444889 = 1490^2 + 667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2664989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332494 + 1332495.

It is an arithmetic number, because the mean of its divisors is an integer number (1332495).

2^2664989 is an apocalyptic number.

It is an amenable number.

2664989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664989 is an equidigital number, since it uses as much as digits as its factorization.

2664989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 2664989 is about 1632.4794026266. The cubic root of 2664989 is about 138.6431680421.

The spelling of 2664989 in words is "two million, six hundred sixty-four thousand, nine hundred eighty-nine".