987490787 has 2 divisors, whose sum is σ = 987490788. Its totient is φ = 987490786.

The previous prime is 987490759. The next prime is 987490789. The reversal of 987490787 is 787094789.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987490787 is a prime.

Together with 987490789, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (987490789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493745393 + 493745394.

It is an arithmetic number, because the mean of its divisors is an integer number (493745394).

Almost surely, 2^987490787 is an apocalyptic number.

987490787 is a deficient number, since it is larger than the sum of its proper divisors (1).

987490787 is an equidigital number, since it uses as much as digits as its factorization.

987490787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 59.

The square root of 987490787 is about 31424.3661352142. The cubic root of 987490787 is about 995.8127537741.

The spelling of 987490787 in words is "nine hundred eighty-seven million, four hundred ninety thousand, seven hundred eighty-seven".