84822839 has 2 divisors, whose sum is σ = 84822840. Its totient is φ = 84822838.

The previous prime is 84822823. The next prime is 84822887. The reversal of 84822839 is 93822848.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84822839 - 2⁴ = 84822823 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84822839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84822239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42411419 + 42411420.

It is an arithmetic number, because the mean of its divisors is an integer number (42411420).

Almost surely, 2^84822839 is an apocalyptic number.

84822839 is a deficient number, since it is larger than the sum of its proper divisors (1).

84822839 is an equidigital number, since it uses as much as digits as its factorization.

84822839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 84822839 is about 9209.9315415480. The cubic root of 84822839 is about 439.3772854348.

Subtracting 84822839 from its reverse (93822848), we obtain a palindrome (9000009).

The spelling of 84822839 in words is "eighty-four million, eight hundred twenty-two thousand, eight hundred thirty-nine".