2002390861 has 2 divisors, whose sum is σ = 2002390862. Its totient is φ = 2002390860.

The previous prime is 2002390837. The next prime is 2002390891. The reversal of 2002390861 is 1680932002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1934328361 + 68062500 = 43981^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002390861 - 2²⁷ = 1868173133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002390891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001195430 + 1001195431.

It is an arithmetic number, because the mean of its divisors is an integer number (1001195431).

Almost surely, 2^2002390861 is an apocalyptic number.

It is an amenable number.

2002390861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002390861 is an equidigital number, since it uses as much as digits as its factorization.

2002390861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2002390861 is about 44748.0822047158. The cubic root of 2002390861 is about 1260.4228993228.

The spelling of 2002390861 in words is "two billion, two million, three hundred ninety thousand, eight hundred sixty-one".