81134038 has 4 divisors (see below), whose sum is σ = 121701060. Its totient is φ = 40567018.

The previous prime is 81134033. The next prime is 81134051. The reversal of 81134038 is 83043118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83043118 = 2 ⋅41521559.

It is a junction number, because it is equal to n+sod(n) for n = 81133997 and 81134015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81134033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283508 + ... + 20283511.

It is an arithmetic number, because the mean of its divisors is an integer number (30425265).

Almost surely, 2^81134038 is an apocalyptic number.

81134038 is a deficient number, since it is larger than the sum of its proper divisors (40567022).

81134038 is a wasteful number, since it uses less digits than its factorization.

81134038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40567021.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 81134038 is about 9007.4434774802. The cubic root of 81134038 is about 432.9134016024.

The spelling of 81134038 in words is "eighty-one million, one hundred thirty-four thousand, thirty-eight".