84228379 has 2 divisors, whose sum is σ = 84228380. Its totient is φ = 84228378.

The previous prime is 84228377. The next prime is 84228407. The reversal of 84228379 is 97382248.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84228379 - 2¹ = 84228377 is a prime.

Together with 84228377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (84228377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42114189 + 42114190.

It is an arithmetic number, because the mean of its divisors is an integer number (42114190).

Almost surely, 2^84228379 is an apocalyptic number.

84228379 is a deficient number, since it is larger than the sum of its proper divisors (1).

84228379 is an equidigital number, since it uses as much as digits as its factorization.

84228379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 84228379 is about 9177.6020288526. The cubic root of 84228379 is about 438.3484557071.

The spelling of 84228379 in words is "eighty-four million, two hundred twenty-eight thousand, three hundred seventy-nine".