872915869 has 4 divisors (see below), whose sum is σ = 997618144. Its totient is φ = 748213596.

The previous prime is 872915851. The next prime is 872915891. The reversal of 872915869 is 968519278.

872915869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968519278 = 2 ⋅484259639.

It is a cyclic number.

It is not a de Polignac number, because 872915869 - 2⁷ = 872915741 is a prime.

It is a super-2 number, since 2×872915869² = 1523964228704050322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872915809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62351127 + ... + 62351140.

It is an arithmetic number, because the mean of its divisors is an integer number (249404536).

Almost surely, 2^872915869 is an apocalyptic number.

It is an amenable number.

872915869 is a deficient number, since it is larger than the sum of its proper divisors (124702275).

872915869 is a wasteful number, since it uses less digits than its factorization.

872915869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124702274.

The product of its digits is 2177280, while the sum is 55.

The square root of 872915869 is about 29545.1496696158. The cubic root of 872915869 is about 955.7055973458.

The spelling of 872915869 in words is "eight hundred seventy-two million, nine hundred fifteen thousand, eight hundred sixty-nine".