84308839 has 2 divisors, whose sum is σ = 84308840. Its totient is φ = 84308838.

The previous prime is 84308803. The next prime is 84308857. The reversal of 84308839 is 93880348.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84308839 - 2¹⁷ = 84177767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84308795 and 84308804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84308239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42154419 + 42154420.

It is an arithmetic number, because the mean of its divisors is an integer number (42154420).

Almost surely, 2^84308839 is an apocalyptic number.

84308839 is a deficient number, since it is larger than the sum of its proper divisors (1).

84308839 is an equidigital number, since it uses as much as digits as its factorization.

84308839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 84308839 is about 9181.9844804922. The cubic root of 84308839 is about 438.4879901989.

The spelling of 84308839 in words is "eighty-four million, three hundred eight thousand, eight hundred thirty-nine".