989764895 has 32 divisors (see below), whose sum is σ = 1373037696. Its totient is φ = 670924800.

The previous prime is 989764889. The next prime is 989764901. The reversal of 989764895 is 598467989.

It is an interprime number because it is at equal distance from previous prime (989764889) and next prime (989764901).

It is not a de Polignac number, because 989764895 - 2²⁴ = 972987679 is a prime.

It is a super-2 number, since 2×989764895² = 1959269094748722050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1543775 + ... + 1544415.

It is an arithmetic number, because the mean of its divisors is an integer number (42907428).

Almost surely, 2^989764895 is an apocalyptic number.

989764895 is a deficient number, since it is larger than the sum of its proper divisors (383272801).

989764895 is a wasteful number, since it uses less digits than its factorization.

989764895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its digits is 39191040, while the sum is 65.

The square root of 989764895 is about 31460.5291595675. The cubic root of 989764895 is about 996.5765919847.

The spelling of 989764895 in words is "nine hundred eighty-nine million, seven hundred sixty-four thousand, eight hundred ninety-five".