83856646 has 4 divisors (see below), whose sum is σ = 125784972. Its totient is φ = 41928322.

The previous prime is 83856629. The next prime is 83856659. The reversal of 83856646 is 64665838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64665838 = 2 ⋅32332919.

It is a junction number, because it is equal to n+sod(n) for n = 83856596 and 83856605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20964160 + ... + 20964163.

It is an arithmetic number, because the mean of its divisors is an integer number (31446243).

Almost surely, 2^83856646 is an apocalyptic number.

83856646 is a deficient number, since it is larger than the sum of its proper divisors (41928326).

83856646 is a wasteful number, since it uses less digits than its factorization.

83856646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41928325.

The product of its digits is 829440, while the sum is 46.

The square root of 83856646 is about 9157.3274485518. The cubic root of 83856646 is about 437.7026365794.

The spelling of 83856646 in words is "eighty-three million, eight hundred fifty-six thousand, six hundred forty-six".