84222491 has 2 divisors, whose sum is σ = 84222492. Its totient is φ = 84222490.

The previous prime is 84222473. The next prime is 84222499. The reversal of 84222491 is 19422248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84222491 - 2⁶ = 84222427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84222499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42111245 + 42111246.

It is an arithmetic number, because the mean of its divisors is an integer number (42111246).

Almost surely, 2^84222491 is an apocalyptic number.

84222491 is a deficient number, since it is larger than the sum of its proper divisors (1).

84222491 is an equidigital number, since it uses as much as digits as its factorization.

84222491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 84222491 is about 9177.2812422852. The cubic root of 84222491 is about 438.3382411931.

The spelling of 84222491 in words is "eighty-four million, two hundred twenty-two thousand, four hundred ninety-one".