681404047 has 8 divisors (see below), whose sum is σ = 722094912. Its totient is φ = 640780800.

The previous prime is 681404041. The next prime is 681404071. The reversal of 681404047 is 740404186.

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 681404047 - 2¹⁵ = 681371279 is a prime.

It is a super-2 number, since 2×681404047² = 928622950535956418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681404041) 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, 4647 + ... + 37207.

It is an arithmetic number, because the mean of its divisors is an integer number (90261864).

Almost surely, 2^681404047 is an apocalyptic number.

681404047 is a deficient number, since it is larger than the sum of its proper divisors (40690865).

681404047 is a wasteful number, since it uses less digits than its factorization.

681404047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33809.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 681404047 is about 26103.7171107871. The cubic root of 681404047 is about 879.9707492860.

The spelling of 681404047 in words is "six hundred eighty-one million, four hundred four thousand, forty-seven".