810993086 has 4 divisors (see below), whose sum is σ = 1216489632. Its totient is φ = 405496542.

The previous prime is 810993019. The next prime is 810993089. The reversal of 810993086 is 680399018.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810993089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202748270 + ... + 202748273.

It is an arithmetic number, because the mean of its divisors is an integer number (304122408).

Almost surely, 2^810993086 is an apocalyptic number.

810993086 is a deficient number, since it is larger than the sum of its proper divisors (405496546).

810993086 is a wasteful number, since it uses less digits than its factorization.

810993086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405496545.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 810993086 is about 28477.9403398490. The cubic root of 810993086 is about 932.5505528828.

The spelling of 810993086 in words is "eight hundred ten million, nine hundred ninety-three thousand, eighty-six".