681412783 has 2 divisors, whose sum is σ = 681412784. Its totient is φ = 681412782.

The previous prime is 681412741. The next prime is 681412807. The reversal of 681412783 is 387214186.

681412783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681412783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681412723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340706391 + 340706392.

It is an arithmetic number, because the mean of its divisors is an integer number (340706392).

Almost surely, 2^681412783 is an apocalyptic number.

681412783 is a deficient number, since it is larger than the sum of its proper divisors (1).

681412783 is an equidigital number, since it uses as much as digits as its factorization.

681412783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 681412783 is about 26103.8844427415. The cubic root of 681412783 is about 879.9745098505.

The spelling of 681412783 in words is "six hundred eighty-one million, four hundred twelve thousand, seven hundred eighty-three".