987790951 has 8 divisors (see below), whose sum is σ = 1151943200. Its totient is φ = 846677664.

The previous prime is 987790949. The next prime is 987790987. The reversal of 987790951 is 159097789.

It is not a de Polignac number, because 987790951 - 2¹ = 987790949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987790892 and 987790901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987790451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439586 + ... + 1440271.

It is an arithmetic number, because the mean of its divisors is an integer number (143992900).

Almost surely, 2^987790951 is an apocalyptic number.

987790951 is a deficient number, since it is larger than the sum of its proper divisors (164152249).

987790951 is an equidigital number, since it uses as much as digits as its factorization.

987790951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2879878 (or 2879864 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 55.

The square root of 987790951 is about 31429.1417477474. The cubic root of 987790951 is about 995.9136414187.

The spelling of 987790951 in words is "nine hundred eighty-seven million, seven hundred ninety thousand, nine hundred fifty-one".