84306786691 has 2 divisors, whose sum is σ = 84306786692. Its totient is φ = 84306786690.

The previous prime is 84306786679. The next prime is 84306786727. The reversal of 84306786691 is 19668760348.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84306786691 - 2⁵ = 84306786659 is a prime.

It is not a weakly prime, because it can be changed into another prime (84306786601) 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, 42153393345 + 42153393346.

It is an arithmetic number, because the mean of its divisors is an integer number (42153393346).

Almost surely, 2^84306786691 is an apocalyptic number.

84306786691 is a deficient number, since it is larger than the sum of its proper divisors (1).

84306786691 is an equidigital number, since it uses as much as digits as its factorization.

84306786691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 84306786691 in words is "eighty-four billion, three hundred six million, seven hundred eighty-six thousand, six hundred ninety-one".