84328391 has 4 divisors (see below), whose sum is σ = 96375312. Its totient is φ = 72281472.

The previous prime is 84328369. The next prime is 84328393. The reversal of 84328391 is 19382348.

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 84328391 - 2¹⁰ = 84327367 is a prime.

It is a super-2 number, since 2×84328391² = 14222555057297762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84328393) 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, 6023450 + ... + 6023463.

It is an arithmetic number, because the mean of its divisors is an integer number (24093828).

Almost surely, 2^84328391 is an apocalyptic number.

84328391 is a deficient number, since it is larger than the sum of its proper divisors (12046921).

84328391 is a wasteful number, since it uses less digits than its factorization.

84328391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12046920.

The product of its digits is 41472, while the sum is 38.

The square root of 84328391 is about 9183.0491123591. The cubic root of 84328391 is about 438.5218840532.

The spelling of 84328391 in words is "eighty-four million, three hundred twenty-eight thousand, three hundred ninety-one".