2420989 has 2 divisors, whose sum is σ = 2420990. Its totient is φ = 2420988.

The previous prime is 2420981. The next prime is 2420993. The reversal of 2420989 is 9890242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 80089 = 1530^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420989 - 2³ = 2420981 is a prime.

It is a super-2 number, since 2×2420989² = 11722375476242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420981) 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, 1210494 + 1210495.

It is an arithmetic number, because the mean of its divisors is an integer number (1210495).

2^2420989 is an apocalyptic number.

It is an amenable number.

2420989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420989 is an equidigital number, since it uses as much as digits as its factorization.

2420989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 2420989 is about 1555.9527627791. The cubic root of 2420989 is about 134.2757557447.

The spelling of 2420989 in words is "two million, four hundred twenty thousand, nine hundred eighty-nine".