681305801 has 8 divisors (see below), whose sum is σ = 743431584. Its totient is φ = 619211520.

The previous prime is 681305791. The next prime is 681305813. The reversal of 681305801 is 108503186.

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-681305801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681305101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82601 + ... + 90473.

It is an arithmetic number, because the mean of its divisors is an integer number (92928948).

Almost surely, 2^681305801 is an apocalyptic number.

It is an amenable number.

681305801 is a deficient number, since it is larger than the sum of its proper divisors (62125783).

681305801 is a wasteful number, since it uses less digits than its factorization.

681305801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15751.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 681305801 is about 26101.8352036787. The cubic root of 681305801 is about 879.9284553578.

Adding to 681305801 its reverse (108503186), we get a palindrome (789808987).

The spelling of 681305801 in words is "six hundred eighty-one million, three hundred five thousand, eight hundred one".