83188139 has 8 divisors (see below), whose sum is σ = 85580880. Its totient is φ = 80812800.

The previous prime is 83188121. The next prime is 83188141. The reversal of 83188139 is 93188138.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83188139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83188096 and 83188105.

It is not an unprimeable number, because it can be changed into a prime (83188199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5672 + ... + 14090.

It is an arithmetic number, because the mean of its divisors is an integer number (10697610).

Almost surely, 2^83188139 is an apocalyptic number.

83188139 is a deficient number, since it is larger than the sum of its proper divisors (2392741).

83188139 is a wasteful number, since it uses less digits than its factorization.

83188139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701.

The product of its digits is 41472, while the sum is 41.

The square root of 83188139 is about 9120.7532035463. The cubic root of 83188139 is about 436.5364070286.

Subtracting 83188139 from its reverse (93188138), we obtain a palindrome (9999999).

The spelling of 83188139 in words is "eighty-three million, one hundred eighty-eight thousand, one hundred thirty-nine".