84068405 has 4 divisors (see below), whose sum is σ = 100882092. Its totient is φ = 67254720.

The previous prime is 84068399. The next prime is 84068423. The reversal of 84068405 is 50486048.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60078001 + 23990404 = 7751^2 + 4898^2 .

It is not a de Polignac number, because 84068405 - 2⁴ = 84068389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8406836 + ... + 8406845.

It is an arithmetic number, because the mean of its divisors is an integer number (25220523).

Almost surely, 2^84068405 is an apocalyptic number.

It is an amenable number.

84068405 is a deficient number, since it is larger than the sum of its proper divisors (16813687).

84068405 is a wasteful number, since it uses less digits than its factorization.

84068405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16813686.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 84068405 is about 9168.8824291731. The cubic root of 84068405 is about 438.0707630851.

The spelling of 84068405 in words is "eighty-four million, sixty-eight thousand, four hundred five".