2390987 has 2 divisors, whose sum is σ = 2390988. Its totient is φ = 2390986.

The previous prime is 2390957. The next prime is 2391001. The reversal of 2390987 is 7890932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2390987 - 2⁶ = 2390923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2390987.

It is not a weakly prime, because it can be changed into another prime (2390917) 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, 1195493 + 1195494.

It is an arithmetic number, because the mean of its divisors is an integer number (1195494).

2^2390987 is an apocalyptic number.

2390987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2390987 is an equidigital number, since it uses as much as digits as its factorization.

2390987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2390987 is about 1546.2816690370. The cubic root of 2390987 is about 133.7187797978.

Subtracting 2390987 from its reverse (7890932), we obtain a palindrome (5499945).

The spelling of 2390987 in words is "two million, three hundred ninety thousand, nine hundred eighty-seven".