681178363 has 2 divisors, whose sum is σ = 681178364. Its totient is φ = 681178362.

The previous prime is 681178357. The next prime is 681178391. The reversal of 681178363 is 363871186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681178363 - 2²¹ = 679081211 is a prime.

It is not a weakly prime, because it can be changed into another prime (681178163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340589181 + 340589182.

It is an arithmetic number, because the mean of its divisors is an integer number (340589182).

Almost surely, 2^681178363 is an apocalyptic number.

681178363 is a deficient number, since it is larger than the sum of its proper divisors (1).

681178363 is an equidigital number, since it uses as much as digits as its factorization.

681178363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 681178363 is about 26099.3939201660. The cubic root of 681178363 is about 879.8735885052.

The spelling of 681178363 in words is "six hundred eighty-one million, one hundred seventy-eight thousand, three hundred sixty-three".