681134801 has 4 divisors (see below), whose sum is σ = 721201572. Its totient is φ = 641068032.

The previous prime is 681134791. The next prime is 681134807. The reversal of 681134801 is 108431186.

It is a happy number.

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 257763025 + 423371776 = 16055^2 + 20576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681134801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681134807) 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, 20033360 + ... + 20033393.

It is an arithmetic number, because the mean of its divisors is an integer number (180300393).

Almost surely, 2^681134801 is an apocalyptic number.

It is an amenable number.

681134801 is a deficient number, since it is larger than the sum of its proper divisors (40066771).

681134801 is a wasteful number, since it uses less digits than its factorization.

681134801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40066770.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 681134801 is about 26098.5593663712. The cubic root of 681134801 is about 879.8548318562.

Adding to 681134801 its reverse (108431186), we get a palindrome (789565987).

The spelling of 681134801 in words is "six hundred eighty-one million, one hundred thirty-four thousand, eight hundred one".