84812291 has 2 divisors, whose sum is σ = 84812292. Its totient is φ = 84812290.

The previous prime is 84812281. The next prime is 84812309. The reversal of 84812291 is 19221848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84812291 - 2²² = 80617987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84812281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42406145 + 42406146.

It is an arithmetic number, because the mean of its divisors is an integer number (42406146).

Almost surely, 2^84812291 is an apocalyptic number.

84812291 is a deficient number, since it is larger than the sum of its proper divisors (1).

84812291 is an equidigital number, since it uses as much as digits as its factorization.

84812291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 84812291 is about 9209.3588810514. The cubic root of 84812291 is about 439.3590720079.

The spelling of 84812291 in words is "eighty-four million, eight hundred twelve thousand, two hundred ninety-one".