681048731 has 8 divisors (see below), whose sum is σ = 768582000. Its totient is φ = 597785440.

The previous prime is 681048671. The next prime is 681048743. The reversal of 681048731 is 137840186.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681048731 is a prime.

It is a super-3 number, since 3×681048731³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681048761) 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, 1067156 + ... + 1067793.

It is an arithmetic number, because the mean of its divisors is an integer number (96072750).

Almost surely, 2^681048731 is an apocalyptic number.

681048731 is a deficient number, since it is larger than the sum of its proper divisors (87533269).

681048731 is a wasteful number, since it uses less digits than its factorization.

681048731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134989.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 681048731 is about 26096.9103726859. The cubic root of 681048731 is about 879.8177700317.

The spelling of 681048731 in words is "six hundred eighty-one million, forty-eight thousand, seven hundred thirty-one".