989878707 has 12 divisors (see below), whose sum is σ = 1431504360. Its totient is φ = 659143968.

The previous prime is 989878699. The next prime is 989878751. The reversal of 989878707 is 707878989.

It is not a de Polignac number, because 989878707 - 2³ = 989878699 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (989878007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56457 + ... + 71882.

It is an arithmetic number, because the mean of its divisors is an integer number (119292030).

Almost surely, 2^989878707 is an apocalyptic number.

989878707 is a deficient number, since it is larger than the sum of its proper divisors (441625653).

989878707 is a wasteful number, since it uses less digits than its factorization.

989878707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129202 (or 129199 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 63.

The square root of 989878707 is about 31462.3379137660. The cubic root of 989878707 is about 996.6147889439.

The spelling of 989878707 in words is "nine hundred eighty-nine million, eight hundred seventy-eight thousand, seven hundred seven".