83509138 has 8 divisors (see below), whose sum is σ = 126032688. Its totient is φ = 41498244.

The previous prime is 83509103. The next prime is 83509141. The reversal of 83509138 is 83190538.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×83509138² = 13947552259006088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83509097 and 83509106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127756 + ... + 128407.

It is an arithmetic number, because the mean of its divisors is an integer number (15754086).

Almost surely, 2^83509138 is an apocalyptic number.

83509138 is a deficient number, since it is larger than the sum of its proper divisors (42523550).

83509138 is a wasteful number, since it uses less digits than its factorization.

83509138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256328.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 83509138 is about 9138.3334366831. Note that the first 3 decimals coincide. The cubic root of 83509138 is about 437.0971756658.

The spelling of 83509138 in words is "eighty-three million, five hundred nine thousand, one hundred thirty-eight".