83279381 has 4 divisors (see below), whose sum is σ = 83314092. Its totient is φ = 83244672.

The previous prime is 83279363. The next prime is 83279401. The reversal of 83279381 is 18397238.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19439281 + 63840100 = 4409^2 + 7990^2 .

It is a cyclic number.

It is not a de Polignac number, because 83279381 - 2²² = 79085077 is a prime.

It is a super-2 number, since 2×83279381² = 13870910599486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83279321) 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, 13466 + ... + 18651.

It is an arithmetic number, because the mean of its divisors is an integer number (20828523).

Almost surely, 2^83279381 is an apocalyptic number.

It is an amenable number.

83279381 is a deficient number, since it is larger than the sum of its proper divisors (34711).

83279381 is a wasteful number, since it uses less digits than its factorization.

83279381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34710.

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

The square root of 83279381 is about 9125.7537222960. The cubic root of 83279381 is about 436.6959486091.

The spelling of 83279381 in words is "eighty-three million, two hundred seventy-nine thousand, three hundred eighty-one".