987940787 has 2 divisors, whose sum is σ = 987940788. Its totient is φ = 987940786.

The previous prime is 987940763. The next prime is 987940801. The reversal of 987940787 is 787049789.

It is a strong prime.

It is an emirp because it is prime and its reverse (787049789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987940787 - 2¹⁰ = 987939763 is a prime.

It is not a weakly prime, because it can be changed into another prime (987940717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493970393 + 493970394.

It is an arithmetic number, because the mean of its divisors is an integer number (493970394).

Almost surely, 2^987940787 is an apocalyptic number.

987940787 is a deficient number, since it is larger than the sum of its proper divisors (1).

987940787 is an equidigital number, since it uses as much as digits as its factorization.

987940787 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 987940787 is about 31431.5253686486. The cubic root of 987940787 is about 995.9639949109.

The spelling of 987940787 in words is "nine hundred eighty-seven million, nine hundred forty thousand, seven hundred eighty-seven".