681847479 has 12 divisors (see below), whose sum is σ = 985402600. Its totient is φ = 454328784.

The previous prime is 681847477. The next prime is 681847487. The reversal of 681847479 is 974748186.

It is a happy number.

It is not a de Polignac number, because 681847479 - 2¹ = 681847477 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 (681847477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409 + ... + 36930.

Almost surely, 2^681847479 is an apocalyptic number.

681847479 is a deficient number, since it is larger than the sum of its proper divisors (303555121).

681847479 is a wasteful number, since it uses less digits than its factorization.

681847479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39374 (or 39371 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 681847479 is about 26112.2093856495. The cubic root of 681847479 is about 880.1615917959.

The spelling of 681847479 in words is "six hundred eighty-one million, eight hundred forty-seven thousand, four hundred seventy-nine".