987951789 has 32 divisors (see below), whose sum is σ = 1633843200. Its totient is φ = 584826480.

The previous prime is 987951773. The next prime is 987951823. The reversal of 987951789 is 987159789.

It is not a de Polignac number, because 987951789 - 2⁴ = 987951773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987951749) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25909 + ... + 51450.

It is an arithmetic number, because the mean of its divisors is an integer number (51057600).

Almost surely, 2^987951789 is an apocalyptic number.

987951789 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

987951789 is a deficient number, since it is larger than the sum of its proper divisors (645891411).

987951789 is a wasteful number, since it uses less digits than its factorization.

987951789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77422 (or 77416 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The square root of 987951789 is about 31431.7003835300. The cubic root of 987951789 is about 995.9676920134.

The spelling of 987951789 in words is "nine hundred eighty-seven million, nine hundred fifty-one thousand, seven hundred eighty-nine".