681410879 has 4 divisors (see below), whose sum is σ = 683110560. Its totient is φ = 679711200.

The previous prime is 681410869. The next prime is 681410897. The reversal of 681410879 is 978014186.

681410879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681410879 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 (681410819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849239 + ... + 850040.

It is an arithmetic number, because the mean of its divisors is an integer number (170777640).

Almost surely, 2^681410879 is an apocalyptic number.

681410879 is a deficient number, since it is larger than the sum of its proper divisors (1699681).

681410879 is a wasteful number, since it uses less digits than its factorization.

681410879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699680.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 681410879 is about 26103.8479730480. The cubic root of 681410879 is about 879.9736902430.

The spelling of 681410879 in words is "six hundred eighty-one million, four hundred ten thousand, eight hundred seventy-nine".