8490491539 has 2 divisors, whose sum is σ = 8490491540. Its totient is φ = 8490491538.

The previous prime is 8490491521. The next prime is 8490491549. The reversal of 8490491539 is 9351940948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8490491539 - 2⁵ = 8490491507 is a prime.

It is not a weakly prime, because it can be changed into another prime (8490491549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245245769 + 4245245770.

It is an arithmetic number, because the mean of its divisors is an integer number (4245245770).

Almost surely, 2^8490491539 is an apocalyptic number.

8490491539 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490491539 is an equidigital number, since it uses as much as digits as its factorization.

8490491539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 8490491539 is about 92143.8632736874. The cubic root of 8490491539 is about 2040.0662815674.

The spelling of 8490491539 in words is "eight billion, four hundred ninety million, four hundred ninety-one thousand, five hundred thirty-nine".