681372758 has 8 divisors (see below), whose sum is σ = 1114973640. Its totient is φ = 309714880.

The previous prime is 681372751. The next prime is 681372787. The reversal of 681372758 is 857273186.

It is a happy number.

681372758 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681372751) 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, 15485723 + ... + 15485766.

It is an arithmetic number, because the mean of its divisors is an integer number (139371705).

Almost surely, 2^681372758 is an apocalyptic number.

681372758 is a deficient number, since it is larger than the sum of its proper divisors (433600882).

681372758 is a wasteful number, since it uses less digits than its factorization.

681372758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30971502.

The product of its digits is 564480, while the sum is 47.

The square root of 681372758 is about 26103.1177831308. The cubic root of 681372758 is about 879.9572801232.

The spelling of 681372758 in words is "six hundred eighty-one million, three hundred seventy-two thousand, seven hundred fifty-eight".