681314971 has 2 divisors, whose sum is σ = 681314972. Its totient is φ = 681314970.

The previous prime is 681314957. The next prime is 681314981. The reversal of 681314971 is 179413186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681314971 - 2¹³ = 681306779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681314911) 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 as a sum of consecutive naturals, namely, 340657485 + 340657486.

It is an arithmetic number, because the mean of its divisors is an integer number (340657486).

Almost surely, 2^681314971 is an apocalyptic number.

681314971 is a deficient number, since it is larger than the sum of its proper divisors (1).

681314971 is an equidigital number, since it uses as much as digits as its factorization.

681314971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 681314971 is about 26102.0108612344. The cubic root of 681314971 is about 879.9324031238.

The spelling of 681314971 in words is "six hundred eighty-one million, three hundred fourteen thousand, nine hundred seventy-one".