84406939 has 4 divisors (see below), whose sum is σ = 84489840. Its totient is φ = 84324040.

The previous prime is 84406937. The next prime is 84406951. The reversal of 84406939 is 93960448.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84406939 - 2¹ = 84406937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84406895 and 84406904.

It is not an unprimeable number, because it can be changed into a prime (84406937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39904 + ... + 41965.

It is an arithmetic number, because the mean of its divisors is an integer number (21122460).

Almost surely, 2^84406939 is an apocalyptic number.

84406939 is a deficient number, since it is larger than the sum of its proper divisors (82901).

84406939 is a wasteful number, since it uses less digits than its factorization.

84406939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82900.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 84406939 is about 9187.3249098962. The cubic root of 84406939 is about 438.6579960926.

The spelling of 84406939 in words is "eighty-four million, four hundred six thousand, nine hundred thirty-nine".