490799987 has 2 divisors, whose sum is σ = 490799988. Its totient is φ = 490799986.

The previous prime is 490799983. The next prime is 490800007. The reversal of 490799987 is 789997094.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 490799987 - 2² = 490799983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (490799983) 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, 245399993 + 245399994.

It is an arithmetic number, because the mean of its divisors is an integer number (245399994).

Almost surely, 2^490799987 is an apocalyptic number.

490799987 is a deficient number, since it is larger than the sum of its proper divisors (1).

490799987 is an equidigital number, since it uses as much as digits as its factorization.

490799987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10287648, while the sum is 62.

The square root of 490799987 is about 22154.0061162761. The cubic root of 490799987 is about 788.8023228744.

The spelling of 490799987 in words is "four hundred ninety million, seven hundred ninety-nine thousand, nine hundred eighty-seven".