84005291 has 2 divisors, whose sum is σ = 84005292. Its totient is φ = 84005290.

The previous prime is 84005287. The next prime is 84005297. The reversal of 84005291 is 19250048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84005291 - 2² = 84005287 is a prime.

It is a Chen prime.

84005291 is a modest number, since divided by 5291 gives 84 as remainder.

It is not a weakly prime, because it can be changed into another prime (84005297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42002645 + 42002646.

It is an arithmetic number, because the mean of its divisors is an integer number (42002646).

Almost surely, 2^84005291 is an apocalyptic number.

84005291 is a deficient number, since it is larger than the sum of its proper divisors (1).

84005291 is an equidigital number, since it uses as much as digits as its factorization.

84005291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 84005291 is about 9165.4400330808. The cubic root of 84005291 is about 437.9611090480.

The spelling of 84005291 in words is "eighty-four million, five thousand, two hundred ninety-one".