2420689 has 2 divisors, whose sum is σ = 2420690. Its totient is φ = 2420688.

The previous prime is 2420687. The next prime is 2420699. The reversal of 2420689 is 9860242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 483025 = 1392^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420689 - 2¹ = 2420687 is a prime.

Together with 2420687, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2420689.

It is not a weakly prime, because it can be changed into another prime (2420687) 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, 1210344 + 1210345.

It is an arithmetic number, because the mean of its divisors is an integer number (1210345).

2^2420689 is an apocalyptic number.

It is an amenable number.

2420689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420689 is an equidigital number, since it uses as much as digits as its factorization.

2420689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2420689 is about 1555.8563558375. The cubic root of 2420689 is about 134.2702091973.

The spelling of 2420689 in words is "two million, four hundred twenty thousand, six hundred eighty-nine".