681163297 has 4 divisors (see below), whose sum is σ = 681865776. Its totient is φ = 680460820.

The previous prime is 681163283. The next prime is 681163459. The reversal of 681163297 is 792361186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681163297 - 2¹⁵ = 681130529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681163207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349783 + ... + 351724.

It is an arithmetic number, because the mean of its divisors is an integer number (170466444).

Almost surely, 2^681163297 is an apocalyptic number.

It is an amenable number.

681163297 is a deficient number, since it is larger than the sum of its proper divisors (702479).

681163297 is an equidigital number, since it uses as much as digits as its factorization.

681163297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702478.

The product of its digits is 108864, while the sum is 43.

The square root of 681163297 is about 26099.1052911781. The cubic root of 681163297 is about 879.8671015731.

The spelling of 681163297 in words is "six hundred eighty-one million, one hundred sixty-three thousand, two hundred ninety-seven".