872429189 has 4 divisors (see below), whose sum is σ = 874707456. Its totient is φ = 870150924.

The previous prime is 872429183. The next prime is 872429197. The reversal of 872429189 is 981924278.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872429189 is a prime.

It is a super-2 number, since 2×872429189² = 1522265379638395442, 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 (872429183) 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, 1138559 + ... + 1139324.

It is an arithmetic number, because the mean of its divisors is an integer number (218676864).

Almost surely, 2^872429189 is an apocalyptic number.

It is an amenable number.

872429189 is a deficient number, since it is larger than the sum of its proper divisors (2278267).

872429189 is a wasteful number, since it uses less digits than its factorization.

872429189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278266.

The product of its digits is 580608, while the sum is 50.

The square root of 872429189 is about 29536.9123132395. The cubic root of 872429189 is about 955.5279516398.

The spelling of 872429189 in words is "eight hundred seventy-two million, four hundred twenty-nine thousand, one hundred eighty-nine".