801967681 has 4 divisors (see below), whose sum is σ = 802156932. Its totient is φ = 801778432.

The previous prime is 801967679. The next prime is 801967687. The reversal of 801967681 is 186769108.

801967681 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.

It can be written as a sum of positive squares in 2 ways, for example, as 40704400 + 761263281 = 6380^2 + 27591^2 .

It is a cyclic number.

It is not a de Polignac number, because 801967681 - 2¹ = 801967679 is a prime.

It is a super-2 number, since 2×801967681² = 1286304322737035522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801967687) 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, 88120 + ... + 96793.

It is an arithmetic number, because the mean of its divisors is an integer number (200539233).

Almost surely, 2^801967681 is an apocalyptic number.

It is an amenable number.

801967681 is a deficient number, since it is larger than the sum of its proper divisors (189251).

801967681 is a wasteful number, since it uses less digits than its factorization.

801967681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189250.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 801967681 is about 28319.0338994818. The cubic root of 801967681 is about 929.0782407551.

The spelling of 801967681 in words is "eight hundred one million, nine hundred sixty-seven thousand, six hundred eighty-one".