681747097 has 8 divisors (see below), whose sum is σ = 686283840. Its totient is φ = 677218800.

The previous prime is 681747091. The next prime is 681747127. The reversal of 681747097 is 790747186.

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-681747097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681747097.

It is not an unprimeable number, because it can be changed into a prime (681747091) 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, 265972 + ... + 268522.

It is an arithmetic number, because the mean of its divisors is an integer number (85785480).

Almost surely, 2^681747097 is an apocalyptic number.

It is an amenable number.

681747097 is a deficient number, since it is larger than the sum of its proper divisors (4536743).

681747097 is a wasteful number, since it uses less digits than its factorization.

681747097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 681747097 is about 26110.2871872371. The cubic root of 681747097 is about 880.1183970348.

The spelling of 681747097 in words is "six hundred eighty-one million, seven hundred forty-seven thousand, ninety-seven".