879000991 has 12 divisors (see below), whose sum is σ = 999495000. Its totient is φ = 771533840.

The previous prime is 879000953. The next prime is 879001007. The reversal of 879000991 is 199000978.

It is not a de Polignac number, because 879000991 - 2¹¹ = 878998943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879000901) 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, 121741 + ... + 128758.

It is an arithmetic number, because the mean of its divisors is an integer number (83291250).

Almost surely, 2^879000991 is an apocalyptic number.

879000991 is a deficient number, since it is larger than the sum of its proper divisors (120494009).

879000991 is a wasteful number, since it uses less digits than its factorization.

879000991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250550 (or 250539 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 879000991 is about 29647.9508735427. The cubic root of 879000991 is about 957.9212074702.

The spelling of 879000991 in words is "eight hundred seventy-nine million, nine hundred ninety-one", and thus it is an aban number.