681111463 has 2 divisors, whose sum is σ = 681111464. Its totient is φ = 681111462.

The previous prime is 681111419. The next prime is 681111469. The reversal of 681111463 is 364111186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681111463 - 2¹³ = 681103271 is a prime.

It is equal to p_35324608 and since 681111463 and 35324608 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681111469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340555731 + 340555732.

It is an arithmetic number, because the mean of its divisors is an integer number (340555732).

Almost surely, 2^681111463 is an apocalyptic number.

681111463 is a deficient number, since it is larger than the sum of its proper divisors (1).

681111463 is an equidigital number, since it uses as much as digits as its factorization.

681111463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 681111463 is about 26098.1122497394. The cubic root of 681111463 is about 879.8447827995.

The spelling of 681111463 in words is "six hundred eighty-one million, one hundred eleven thousand, four hundred sixty-three".