84088391 has 4 divisors (see below), whose sum is σ = 87744432. Its totient is φ = 80432352.

The previous prime is 84088387. The next prime is 84088421. The reversal of 84088391 is 19388048.

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 84088391 - 2² = 84088387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84088321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827986 + ... + 1828031.

It is an arithmetic number, because the mean of its divisors is an integer number (21936108).

Almost surely, 2^84088391 is an apocalyptic number.

84088391 is a deficient number, since it is larger than the sum of its proper divisors (3656041).

84088391 is a wasteful number, since it uses less digits than its factorization.

84088391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656040.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 84088391 is about 9169.9722464138. The cubic root of 84088391 is about 438.1054752482.

The spelling of 84088391 in words is "eighty-four million, eighty-eight thousand, three hundred ninety-one".