83653985 has 8 divisors (see below), whose sum is σ = 101760360. Its totient is φ = 66006144.

The previous prime is 83653949. The next prime is 83653987. The reversal of 83653985 is 58935638.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 83594449 = 244^2 + 9143^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83653985 - 2²⁰ = 82605409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83653987) 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, 114230 + ... + 114959.

It is an arithmetic number, because the mean of its divisors is an integer number (12720045).

Almost surely, 2^83653985 is an apocalyptic number.

It is an amenable number.

83653985 is a deficient number, since it is larger than the sum of its proper divisors (18106375).

83653985 is a wasteful number, since it uses less digits than its factorization.

83653985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229267.

The product of its digits is 777600, while the sum is 47.

The square root of 83653985 is about 9146.2552446343. The cubic root of 83653985 is about 437.3497454094.

The spelling of 83653985 in words is "eighty-three million, six hundred fifty-three thousand, nine hundred eighty-five".