84100439 has 2 divisors, whose sum is σ = 84100440. Its totient is φ = 84100438.

The previous prime is 84100433. The next prime is 84100481. The reversal of 84100439 is 93400148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84100439 - 2⁸ = 84100183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84100433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42050219 + 42050220.

It is an arithmetic number, because the mean of its divisors is an integer number (42050220).

Almost surely, 2^84100439 is an apocalyptic number.

84100439 is a deficient number, since it is larger than the sum of its proper divisors (1).

84100439 is an equidigital number, since it uses as much as digits as its factorization.

84100439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 84100439 is about 9170.6291496276. The cubic root of 84100439 is about 438.1263978458.

The spelling of 84100439 in words is "eighty-four million, one hundred thousand, four hundred thirty-nine".