872402689 has 4 divisors (see below), whose sum is σ = 918318640. Its totient is φ = 826486740.

The previous prime is 872402681. The next prime is 872402693. The reversal of 872402689 is 986204278.

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 not a de Polignac number, because 872402689 - 2³ = 872402681 is a prime.

It is a super-3 number, since 3×872402689³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (872402681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22957947 + ... + 22957984.

It is an arithmetic number, because the mean of its divisors is an integer number (229579660).

Almost surely, 2^872402689 is an apocalyptic number.

It is an amenable number.

872402689 is a deficient number, since it is larger than the sum of its proper divisors (45915951).

872402689 is a wasteful number, since it uses less digits than its factorization.

872402689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45915950.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 872402689 is about 29536.4637185971. The cubic root of 872402689 is about 955.5182768347.

The spelling of 872402689 in words is "eight hundred seventy-two million, four hundred two thousand, six hundred eighty-nine".