83278133 has 4 divisors (see below), whose sum is σ = 84281568. Its totient is φ = 82274700.

The previous prime is 83278123. The next prime is 83278163. The reversal of 83278133 is 33187238.

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.

It is a cyclic number.

It is not a de Polignac number, because 83278133 - 2¹⁴ = 83261749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83278093 and 83278102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83278103) 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, 501593 + ... + 501758.

It is an arithmetic number, because the mean of its divisors is an integer number (21070392).

Almost surely, 2^83278133 is an apocalyptic number.

83278133 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

83278133 is a deficient number, since it is larger than the sum of its proper divisors (1003435).

83278133 is a wasteful number, since it uses less digits than its factorization.

83278133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003434.

The product of its digits is 24192, while the sum is 35.

The square root of 83278133 is about 9125.6853441262. The cubic root of 83278133 is about 436.6937671997.

The spelling of 83278133 in words is "eighty-three million, two hundred seventy-eight thousand, one hundred thirty-three".