83139646 has 4 divisors (see below), whose sum is σ = 124709472. Its totient is φ = 41569822.

The previous prime is 83139631. The next prime is 83139647. The reversal of 83139646 is 64693138.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 83139599 and 83139608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83139647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20784910 + ... + 20784913.

It is an arithmetic number, because the mean of its divisors is an integer number (31177368).

Almost surely, 2^83139646 is an apocalyptic number.

83139646 is a deficient number, since it is larger than the sum of its proper divisors (41569826).

83139646 is a wasteful number, since it uses less digits than its factorization.

83139646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41569825.

The product of its digits is 93312, while the sum is 40.

The square root of 83139646 is about 9118.0944281138. The cubic root of 83139646 is about 436.4515669103.

The spelling of 83139646 in words is "eighty-three million, one hundred thirty-nine thousand, six hundred forty-six".