987820499 has 2 divisors, whose sum is σ = 987820500. Its totient is φ = 987820498.

The previous prime is 987820453. The next prime is 987820517. The reversal of 987820499 is 994028789.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987820499 - 2²⁰ = 986771923 is a prime.

It is not a weakly prime, because it can be changed into another prime (987822499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493910249 + 493910250.

It is an arithmetic number, because the mean of its divisors is an integer number (493910250).

Almost surely, 2^987820499 is an apocalyptic number.

987820499 is a deficient number, since it is larger than the sum of its proper divisors (1).

987820499 is an equidigital number, since it uses as much as digits as its factorization.

987820499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 987820499 is about 31429.6118175201. The cubic root of 987820499 is about 995.9235716449.

The spelling of 987820499 in words is "nine hundred eighty-seven million, eight hundred twenty thousand, four hundred ninety-nine".