813008693 has 4 divisors (see below), whose sum is σ = 929152800. Its totient is φ = 696864588.

The previous prime is 813008687. The next prime is 813008699. The reversal of 813008693 is 396800318.

813008693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 396800318 = 2 ⋅198400159.

It is an interprime number because it is at equal distance from previous prime (813008687) and next prime (813008699).

It is a de Polignac number, because none of the positive numbers 2^k-813008693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813008699) 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, 58072043 + ... + 58072056.

It is an arithmetic number, because the mean of its divisors is an integer number (232288200).

Almost surely, 2^813008693 is an apocalyptic number.

It is an amenable number.

813008693 is a deficient number, since it is larger than the sum of its proper divisors (116144107).

813008693 is a wasteful number, since it uses less digits than its factorization.

813008693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116144106.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 813008693 is about 28513.3072967693. The cubic root of 813008693 is about 933.3224872748.

The spelling of 813008693 in words is "eight hundred thirteen million, eight thousand, six hundred ninety-three".