83963665 has 4 divisors (see below), whose sum is σ = 100756404. Its totient is φ = 67170928.

The previous prime is 83963657. The next prime is 83963689. The reversal of 83963665 is 56636938.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18045504 + 65918161 = 4248^2 + 8119^2 .

It is a cyclic number.

It is not a de Polignac number, because 83963665 - 2³ = 83963657 is a prime.

It is a Duffinian number.

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, 8396362 + ... + 8396371.

It is an arithmetic number, because the mean of its divisors is an integer number (25189101).

Almost surely, 2^83963665 is an apocalyptic number.

It is an amenable number.

83963665 is a deficient number, since it is larger than the sum of its proper divisors (16792739).

83963665 is a wasteful number, since it uses less digits than its factorization.

83963665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16792738.

The product of its digits is 699840, while the sum is 46.

The square root of 83963665 is about 9163.1689387460. The cubic root of 83963665 is about 437.8887581246. Note that the first 3 decimals are identical.

The spelling of 83963665 in words is "eighty-three million, nine hundred sixty-three thousand, six hundred sixty-five".