83111791 has 12 divisors (see below), whose sum is σ = 98508312. Its totient is φ = 69892368.

The previous prime is 83111779. The next prime is 83111807. The reversal of 83111791 is 19711138.

It is not a de Polignac number, because 83111791 - 2²³ = 74723183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83111701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13405 + ... + 18598.

It is an arithmetic number, because the mean of its divisors is an integer number (8209026).

Almost surely, 2^83111791 is an apocalyptic number.

83111791 is a deficient number, since it is larger than the sum of its proper divisors (15396521).

83111791 is a wasteful number, since it uses less digits than its factorization.

83111791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32070 (or 32063 counting only the distinct ones).

The product of its digits is 1512, while the sum is 31.

The square root of 83111791 is about 9116.5668428417. The cubic root of 83111791 is about 436.4028187420.

The spelling of 83111791 in words is "eighty-three million, one hundred eleven thousand, seven hundred ninety-one".