84406039 has 2 divisors, whose sum is σ = 84406040. Its totient is φ = 84406038.

The previous prime is 84406019. The next prime is 84406043. The reversal of 84406039 is 93060448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84406039 - 2¹³ = 84397847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84405995 and 84406013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84406009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42203019 + 42203020.

It is an arithmetic number, because the mean of its divisors is an integer number (42203020).

Almost surely, 2^84406039 is an apocalyptic number.

84406039 is a deficient number, since it is larger than the sum of its proper divisors (1).

84406039 is an equidigital number, since it uses as much as digits as its factorization.

84406039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 84406039 is about 9187.2759292404. The cubic root of 84406039 is about 438.6564370044.

The spelling of 84406039 in words is "eighty-four million, four hundred six thousand, thirty-nine".