872993789 has 2 divisors, whose sum is σ = 872993790. Its totient is φ = 872993788.

The previous prime is 872993767. The next prime is 872993801. The reversal of 872993789 is 987399278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 736688164 + 136305625 = 27142^2 + 11675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872993789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872993749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436496894 + 436496895.

It is an arithmetic number, because the mean of its divisors is an integer number (436496895).

Almost surely, 2^872993789 is an apocalyptic number.

It is an amenable number.

872993789 is a deficient number, since it is larger than the sum of its proper divisors (1).

872993789 is an equidigital number, since it uses as much as digits as its factorization.

872993789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 62.

The square root of 872993789 is about 29546.4682999508. The cubic root of 872993789 is about 955.7340332150.

The spelling of 872993789 in words is "eight hundred seventy-two million, nine hundred ninety-three thousand, seven hundred eighty-nine".