84272191 has 2 divisors, whose sum is σ = 84272192. Its totient is φ = 84272190.

The previous prime is 84272147. The next prime is 84272197. The reversal of 84272191 is 19127248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84272191 - 2⁷ = 84272063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84272197) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42136095 + 42136096.

It is an arithmetic number, because the mean of its divisors is an integer number (42136096).

Almost surely, 2^84272191 is an apocalyptic number.

84272191 is a deficient number, since it is larger than the sum of its proper divisors (1).

84272191 is an equidigital number, since it uses as much as digits as its factorization.

84272191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 84272191 is about 9179.9886165507. The cubic root of 84272191 is about 438.4244459053.

The spelling of 84272191 in words is "eighty-four million, two hundred seventy-two thousand, one hundred ninety-one".