813732817 has 8 divisors (see below), whose sum is σ = 876481760. Its totient is φ = 752976000.

The previous prime is 813732791. The next prime is 813732839. The reversal of 813732817 is 718237318.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813732817 is a prime.

It is a super-2 number, since 2×813732817² = 1324322194925510978, which contains 22 as substring.

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 813732817.

It is not an unprimeable number, because it can be changed into a prime (813732317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497184 + ... + 498817.

It is an arithmetic number, because the mean of its divisors is an integer number (109560220).

Almost surely, 2^813732817 is an apocalyptic number.

It is an amenable number.

813732817 is a deficient number, since it is larger than the sum of its proper divisors (62748943).

813732817 is a wasteful number, since it uses less digits than its factorization.

813732817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996063.

The product of its digits is 56448, while the sum is 40.

The square root of 813732817 is about 28526.0024714295. The cubic root of 813732817 is about 933.5994997540.

The spelling of 813732817 in words is "eight hundred thirteen million, seven hundred thirty-two thousand, eight hundred seventeen".