84091659 has 4 divisors (see below), whose sum is σ = 112122216. Its totient is φ = 56061104.

The previous prime is 84091649. The next prime is 84091661. The reversal of 84091659 is 95619048.

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 84091659 - 2¹⁶ = 84026123 is a prime.

It is a super-2 number, since 2×84091659² = 14142814226744562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84091659.

It is not an unprimeable number, because it can be changed into a prime (84091649) 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, 14015274 + ... + 14015279.

It is an arithmetic number, because the mean of its divisors is an integer number (28030554).

Almost surely, 2^84091659 is an apocalyptic number.

84091659 is a deficient number, since it is larger than the sum of its proper divisors (28030557).

84091659 is a wasteful number, since it uses less digits than its factorization.

84091659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030556.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 84091659 is about 9170.1504349711. The cubic root of 84091659 is about 438.1111506656. Note that the first 4 decimals are identical.

The spelling of 84091659 in words is "eighty-four million, ninety-one thousand, six hundred fifty-nine".