84227261 has 2 divisors, whose sum is σ = 84227262. Its totient is φ = 84227260.

The previous prime is 84227179. The next prime is 84227263. The reversal of 84227261 is 16272248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 42055225 = 6494^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 84227261 - 2²⁶ = 17118397 is a prime.

It is a Sophie Germain prime.

Together with 84227263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84227263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42113630 + 42113631.

It is an arithmetic number, because the mean of its divisors is an integer number (42113631).

Almost surely, 2^84227261 is an apocalyptic number.

It is an amenable number.

84227261 is a deficient number, since it is larger than the sum of its proper divisors (1).

84227261 is an equidigital number, since it uses as much as digits as its factorization.

84227261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

The square root of 84227261 is about 9177.5411194938. The cubic root of 84227261 is about 438.3465162351.

The spelling of 84227261 in words is "eighty-four million, two hundred twenty-seven thousand, two hundred sixty-one".