83278191 has 8 divisors (see below), whose sum is σ = 111089664. Its totient is φ = 55492760.

The previous prime is 83278171. The next prime is 83278199. The reversal of 83278191 is 19187238.

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 83278191 - 2¹⁰ = 83277167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83278199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2896 + ... + 13226.

It is an arithmetic number, because the mean of its divisors is an integer number (13886208).

Almost surely, 2^83278191 is an apocalyptic number.

83278191 is a deficient number, since it is larger than the sum of its proper divisors (27811473).

83278191 is a wasteful number, since it uses less digits than its factorization.

83278191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13021.

The product of its digits is 24192, while the sum is 39.

The square root of 83278191 is about 9125.6885219692. The cubic root of 83278191 is about 436.6938685798.

The spelling of 83278191 in words is "eighty-three million, two hundred seventy-eight thousand, one hundred ninety-one".