681870741 has 8 divisors (see below), whose sum is σ = 919376640. Its totient is φ = 449472672.

The previous prime is 681870691. The next prime is 681870757. The reversal of 681870741 is 147078186.

It is a happy number.

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

It is not a de Polignac number, because 681870741 - 2¹⁰ = 681869717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681870693 and 681870702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681870641) 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, 1276645 + ... + 1277178.

It is an arithmetic number, because the mean of its divisors is an integer number (114922080).

Almost surely, 2^681870741 is an apocalyptic number.

It is an amenable number.

681870741 is a deficient number, since it is larger than the sum of its proper divisors (237505899).

681870741 is a wasteful number, since it uses less digits than its factorization.

681870741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553915.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 681870741 is about 26112.6548056685. The cubic root of 681870741 is about 880.1716009191.

The spelling of 681870741 in words is "six hundred eighty-one million, eight hundred seventy thousand, seven hundred forty-one".