83278193 has 4 divisors (see below), whose sum is σ = 86899008. Its totient is φ = 79657380.

The previous prime is 83278171. The next prime is 83278199. The reversal of 83278193 is 39187238.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39187238 = 2 ⋅19593619.

It is a cyclic number.

It is not a de Polignac number, because 83278193 - 2¹⁴ = 83261809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 83278193.

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 3 ways as a sum of consecutive naturals, for example, 1810373 + ... + 1810418.

It is an arithmetic number, because the mean of its divisors is an integer number (21724752).

Almost surely, 2^83278193 is an apocalyptic number.

It is an amenable number.

83278193 is a deficient number, since it is larger than the sum of its proper divisors (3620815).

83278193 is a wasteful number, since it uses less digits than its factorization.

83278193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620814.

The product of its digits is 72576, while the sum is 41.

The square root of 83278193 is about 9125.6886315500. The cubic root of 83278193 is about 436.6938720756.

The spelling of 83278193 in words is "eighty-three million, two hundred seventy-eight thousand, one hundred ninety-three".