872588989 has 2 divisors, whose sum is σ = 872588990. Its totient is φ = 872588988.

The previous prime is 872588963. The next prime is 872588999. The reversal of 872588989 is 989885278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868304089 + 4284900 = 29467^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 872588989 - 2²⁵ = 839034557 is a prime.

It is a super-2 number, since 2×872588989² = 1522823087448084242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 872588989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872588999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436294494 + 436294495.

It is an arithmetic number, because the mean of its divisors is an integer number (436294495).

Almost surely, 2^872588989 is an apocalyptic number.

It is an amenable number.

872588989 is a deficient number, since it is larger than the sum of its proper divisors (1).

872588989 is an equidigital number, since it uses as much as digits as its factorization.

872588989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 64.

The square root of 872588989 is about 29539.6172791727. The cubic root of 872588989 is about 955.5862883877.

The spelling of 872588989 in words is "eight hundred seventy-two million, five hundred eighty-eight thousand, nine hundred eighty-nine".