802908989 has 4 divisors (see below), whose sum is σ = 802985760. Its totient is φ = 802832220.

The previous prime is 802908979. The next prime is 802909007. The reversal of 802908989 is 989809208.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-802908989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 802908989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802908919) 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, 19649 + ... + 44630.

It is an arithmetic number, because the mean of its divisors is an integer number (200746440).

Almost surely, 2^802908989 is an apocalyptic number.

It is an amenable number.

802908989 is a deficient number, since it is larger than the sum of its proper divisors (76771).

802908989 is a wasteful number, since it uses less digits than its factorization.

802908989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76770.

The product of its (nonzero) digits is 746496, while the sum is 53.

The square root of 802908989 is about 28335.6487308832. The cubic root of 802908989 is about 929.4415998853.

The spelling of 802908989 in words is "eight hundred two million, nine hundred eight thousand, nine hundred eighty-nine".