872581129 has 4 divisors (see below), whose sum is σ = 997235584. Its totient is φ = 747926676.

The previous prime is 872581109. The next prime is 872581139. The reversal of 872581129 is 921185278.

It is a happy number.

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 not a de Polignac number, because 872581129 - 2⁷ = 872581001 is a prime.

It is a super-2 number, since 2×872581129² = 1522795653373829282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872581109) 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, 62327217 + ... + 62327230.

It is an arithmetic number, because the mean of its divisors is an integer number (249308896).

Almost surely, 2^872581129 is an apocalyptic number.

It is an amenable number.

872581129 is a deficient number, since it is larger than the sum of its proper divisors (124654455).

872581129 is a wasteful number, since it uses less digits than its factorization.

872581129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124654454.

The product of its digits is 80640, while the sum is 43.

The square root of 872581129 is about 29539.4842372036. The cubic root of 872581129 is about 955.5834191748.

The spelling of 872581129 in words is "eight hundred seventy-two million, five hundred eighty-one thousand, one hundred twenty-nine".