872897991 has 8 divisors (see below), whose sum is σ = 1330130304. Its totient is φ = 498798840.

The previous prime is 872897951. The next prime is 872898007. The reversal of 872897991 is 199798278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 872897991 - 2¹³ = 872889799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872897951) 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, 20783265 + ... + 20783306.

It is an arithmetic number, because the mean of its divisors is an integer number (166266288).

Almost surely, 2^872897991 is an apocalyptic number.

872897991 is a deficient number, since it is larger than the sum of its proper divisors (457232313).

872897991 is a wasteful number, since it uses less digits than its factorization.

872897991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41566581.

The product of its digits is 4572288, while the sum is 60.

The square root of 872897991 is about 29544.8471141754. The cubic root of 872897991 is about 955.6990727685.

The spelling of 872897991 in words is "eight hundred seventy-two million, eight hundred ninety-seven thousand, nine hundred ninety-one".