83971646 has 16 divisors (see below), whose sum is σ = 142147440. Its totient is φ = 36852480.

The previous prime is 83971637. The next prime is 83971651. The reversal of 83971646 is 64617938.

It is a junction number, because it is equal to n+sod(n) for n = 83971597 and 83971606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65171 + ... + 66446.

It is an arithmetic number, because the mean of its divisors is an integer number (8884215).

Almost surely, 2^83971646 is an apocalyptic number.

83971646 is a deficient number, since it is larger than the sum of its proper divisors (58175794).

83971646 is a wasteful number, since it uses less digits than its factorization.

83971646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131659.

The product of its digits is 217728, while the sum is 44.

The square root of 83971646 is about 9163.6044218419. The cubic root of 83971646 is about 437.9026319014.

The spelling of 83971646 in words is "eighty-three million, nine hundred seventy-one thousand, six hundred forty-six".