2390285981 has 2 divisors, whose sum is σ = 2390285982. Its totient is φ = 2390285980.

The previous prime is 2390285957. The next prime is 2390286007. The reversal of 2390285981 is 1895820932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493822500 + 896463481 = 38650^2 + 29941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2390285981 is a prime.

It is a super-2 number, since 2×2390285981² = 11426934141930264722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2390285921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195142990 + 1195142991.

It is an arithmetic number, because the mean of its divisors is an integer number (1195142991).

Almost surely, 2^2390285981 is an apocalyptic number.

It is an amenable number.

2390285981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2390285981 is an equidigital number, since it uses as much as digits as its factorization.

2390285981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 2390285981 is about 48890.5510400527. The cubic root of 2390285981 is about 1337.0571008116.

The spelling of 2390285981 in words is "two billion, three hundred ninety million, two hundred eighty-five thousand, nine hundred eighty-one".