84220993 has 2 divisors, whose sum is σ = 84220994. Its totient is φ = 84220992.

The previous prime is 84220951. The next prime is 84221003. The reversal of 84220993 is 39902248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47169424 + 37051569 = 6868^2 + 6087^2 .

It is a cyclic number.

It is not a de Polignac number, because 84220993 - 2⁹ = 84220481 is a prime.

It is not a weakly prime, because it can be changed into another prime (84220693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42110496 + 42110497.

It is an arithmetic number, because the mean of its divisors is an integer number (42110497).

Almost surely, 2^84220993 is an apocalyptic number.

It is an amenable number.

84220993 is a deficient number, since it is larger than the sum of its proper divisors (1).

84220993 is an equidigital number, since it uses as much as digits as its factorization.

84220993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 84220993 is about 9177.1996273373. The cubic root of 84220993 is about 438.3356423838.

The spelling of 84220993 in words is "eighty-four million, two hundred twenty thousand, nine hundred ninety-three".