83801138 has 4 divisors (see below), whose sum is σ = 125701710. Its totient is φ = 41900568.

The previous prime is 83801131. The next prime is 83801161. The reversal of 83801138 is 83110838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83110838 = 2 ⋅41555419.

It can be written as a sum of positive squares in only one way, i.e., 60016009 + 23785129 = 7747^2 + 4877^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83801131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20950283 + ... + 20950286.

Almost surely, 2^83801138 is an apocalyptic number.

83801138 is a deficient number, since it is larger than the sum of its proper divisors (41900572).

83801138 is a wasteful number, since it uses less digits than its factorization.

83801138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41900571.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 83801138 is about 9154.2961498960. The cubic root of 83801138 is about 437.6060377531.

The spelling of 83801138 in words is "eighty-three million, eight hundred one thousand, one hundred thirty-eight".