83123779 has 4 divisors (see below), whose sum is σ = 83303776. Its totient is φ = 82943784.

The previous prime is 83123767. The next prime is 83123783. The reversal of 83123779 is 97732138.

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

It is a cyclic number.

It is not a de Polignac number, because 83123779 - 2⁹ = 83123267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83123759) 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, 89304 + ... + 90229.

It is an arithmetic number, because the mean of its divisors is an integer number (20825944).

Almost surely, 2^83123779 is an apocalyptic number.

83123779 is a deficient number, since it is larger than the sum of its proper divisors (179997).

83123779 is a wasteful number, since it uses less digits than its factorization.

83123779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179996.

The product of its digits is 63504, while the sum is 40.

The square root of 83123779 is about 9117.2243034818. The cubic root of 83123779 is about 436.4237999024.

The spelling of 83123779 in words is "eighty-three million, one hundred twenty-three thousand, seven hundred seventy-nine".