681004477 has 8 divisors (see below), whose sum is σ = 704987640. Its totient is φ = 657054720.

The previous prime is 681004469. The next prime is 681004481. The reversal of 681004477 is 774400186.

It can be written as a sum of positive squares in 4 ways, for example, as 264196 + 680740281 = 514^2 + 26091^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 681004477 - 2³ = 681004469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681005477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37477 + ... + 52597.

It is an arithmetic number, because the mean of its divisors is an integer number (88123455).

Almost surely, 2^681004477 is an apocalyptic number.

It is an amenable number.

681004477 is a deficient number, since it is larger than the sum of its proper divisors (23983163).

681004477 is a wasteful number, since it uses less digits than its factorization.

681004477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16703.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 681004477 is about 26096.0624807652. The cubic root of 681004477 is about 879.7987130013.

The spelling of 681004477 in words is "six hundred eighty-one million, four thousand, four hundred seventy-seven".