83304391 has 4 divisors (see below), whose sum is σ = 84041712. Its totient is φ = 82567072.

The previous prime is 83304343. The next prime is 83304421. The reversal of 83304391 is 19340338.

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 83304391 - 2⁹ = 83303879 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83304191) 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, 368491 + ... + 368716.

It is an arithmetic number, because the mean of its divisors is an integer number (21010428).

Almost surely, 2^83304391 is an apocalyptic number.

83304391 is the 5773-rd centered pentagonal number.

83304391 is a deficient number, since it is larger than the sum of its proper divisors (737321).

83304391 is a wasteful number, since it uses less digits than its factorization.

83304391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737320.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 83304391 is about 9127.1239172041. The cubic root of 83304391 is about 436.7396595989.

It can be divided in two parts, 8330 and 4391, that added together give a palindrome (12721).

The spelling of 83304391 in words is "eighty-three million, three hundred four thousand, three hundred ninety-one".