84049147691 has 2 divisors, whose sum is σ = 84049147692. Its totient is φ = 84049147690.

The previous prime is 84049147681. The next prime is 84049147747. The reversal of 84049147691 is 19674194048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84049147691 - 2²² = 84044953387 is a prime.

It is not a weakly prime, because it can be changed into another prime (84049147661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42024573845 + 42024573846.

It is an arithmetic number, because the mean of its divisors is an integer number (42024573846).

Almost surely, 2^84049147691 is an apocalyptic number.

84049147691 is a deficient number, since it is larger than the sum of its proper divisors (1).

84049147691 is an equidigital number, since it uses as much as digits as its factorization.

84049147691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 84049147691 in words is "eighty-four billion, forty-nine million, one hundred forty-seven thousand, six hundred ninety-one".