816988922 has 8 divisors (see below), whose sum is σ = 1225640916. Its totient is φ = 408441952.

The previous prime is 816988901. The next prime is 816988943. The reversal of 816988922 is 229889618.

It is an interprime number because it is at equal distance from previous prime (816988901) and next prime (816988943).

It can be written as a sum of positive squares in 2 ways, for example, as 805367641 + 11621281 = 28379^2 + 3409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513 + ... + 40500.

Almost surely, 2^816988922 is an apocalyptic number.

816988922 is a deficient number, since it is larger than the sum of its proper divisors (408651994).

816988922 is a wasteful number, since it uses less digits than its factorization.

816988922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52512.

The product of its digits is 995328, while the sum is 53.

The square root of 816988922 is about 28583.0180701759. The cubic root of 816988922 is about 934.8430907159.

The spelling of 816988922 in words is "eight hundred sixteen million, nine hundred eighty-eight thousand, nine hundred twenty-two".