890378720459 has 2 divisors, whose sum is σ = 890378720460. Its totient is φ = 890378720458.

The previous prime is 890378720443. The next prime is 890378720507. The reversal of 890378720459 is 954027873098.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 890378720459 - 2⁴ = 890378720443 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (890378720359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445189360229 + 445189360230.

It is an arithmetic number, because the mean of its divisors is an integer number (445189360230).

Almost surely, 2^890378720459 is an apocalyptic number.

890378720459 is a deficient number, since it is larger than the sum of its proper divisors (1).

890378720459 is an equidigital number, since it uses as much as digits as its factorization.

890378720459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 890378720459 in words is "eight hundred ninety billion, three hundred seventy-eight million, seven hundred twenty thousand, four hundred fifty-nine".