681006961 has 8 divisors (see below), whose sum is σ = 731829600. Its totient is φ = 631380288.

The previous prime is 681006959. The next prime is 681006983. The reversal of 681006961 is 169600186.

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

It is a cyclic number.

It is not a de Polignac number, because 681006961 - 2¹ = 681006959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681006961.

It is not an unprimeable number, because it can be changed into a prime (681006901) 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, 297811 + ... + 300088.

It is an arithmetic number, because the mean of its divisors is an integer number (91478700).

Almost surely, 2^681006961 is an apocalyptic number.

It is an amenable number.

681006961 is a deficient number, since it is larger than the sum of its proper divisors (50822639).

681006961 is a wasteful number, since it uses less digits than its factorization.

681006961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597983.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 681006961 is about 26096.1100741087. The cubic root of 681006961 is about 879.7997827042.

The spelling of 681006961 in words is "six hundred eighty-one million, six thousand, nine hundred sixty-one".