83091138 has 64 divisors (see below), whose sum is σ = 191020032. Its totient is φ = 23869440.

The previous prime is 83091137. The next prime is 83091149. The reversal of 83091138 is 83119038.

It is a junction number, because it is equal to n+sod(n) for n = 83091099 and 83091108.

It is not an unprimeable number, because it can be changed into a prime (83091137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295558 + ... + 295838.

It is an arithmetic number, because the mean of its divisors is an integer number (2984688).

Almost surely, 2^83091138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83091138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95510016).

83091138 is an abundant number, since it is smaller than the sum of its proper divisors (107928894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83091138 is a wasteful number, since it uses less digits than its factorization.

83091138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 83091138 is about 9115.4340543937. The cubic root of 83091138 is about 436.3666675373.

The spelling of 83091138 in words is "eighty-three million, ninety-one thousand, one hundred thirty-eight".