807199681 has 4 divisors (see below), whose sum is σ = 813555712. Its totient is φ = 800843652.

The previous prime is 807199663. The next prime is 807199691. The reversal of 807199681 is 186991708.

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.

It is a cyclic number.

It is not a de Polignac number, because 807199681 - 2⁵ = 807199649 is a prime.

It is a super-2 number, since 2×807199681² = 1303142650013003522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (807199621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3177825 + ... + 3178078.

It is an arithmetic number, because the mean of its divisors is an integer number (203388928).

Almost surely, 2^807199681 is an apocalyptic number.

It is an amenable number.

807199681 is a deficient number, since it is larger than the sum of its proper divisors (6356031).

807199681 is a wasteful number, since it uses less digits than its factorization.

807199681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356030.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 807199681 is about 28411.2597573568. The cubic root of 807199681 is about 931.0942840340.

The spelling of 807199681 in words is "eight hundred seven million, one hundred ninety-nine thousand, six hundred eighty-one".