83965391 has 8 divisors (see below), whose sum is σ = 87004800. Its totient is φ = 80946720.

The previous prime is 83965379. The next prime is 83965393. The reversal of 83965391 is 19356938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83965391 - 2¹⁴ = 83949007 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 (83965393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 13373.

It is an arithmetic number, because the mean of its divisors is an integer number (10875600).

Almost surely, 2^83965391 is an apocalyptic number.

83965391 is a deficient number, since it is larger than the sum of its proper divisors (3039409).

83965391 is a wasteful number, since it uses less digits than its factorization.

83965391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10369.

The product of its digits is 174960, while the sum is 44.

The square root of 83965391 is about 9163.2631196534. The cubic root of 83965391 is about 437.8917585924.

The spelling of 83965391 in words is "eighty-three million, nine hundred sixty-five thousand, three hundred ninety-one".