83213985 has 8 divisors (see below), whose sum is σ = 133142400. Its totient is φ = 44380784.

The previous prime is 83213983. The next prime is 83213993. The reversal of 83213985 is 58931238.

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 83213985 - 2¹ = 83213983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83213981) 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, 2773785 + ... + 2773814.

It is an arithmetic number, because the mean of its divisors is an integer number (16642800).

Almost surely, 2^83213985 is an apocalyptic number.

It is an amenable number.

83213985 is a deficient number, since it is larger than the sum of its proper divisors (49928415).

83213985 is a wasteful number, since it uses less digits than its factorization.

83213985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5547607.

The product of its digits is 51840, while the sum is 39.

The square root of 83213985 is about 9122.1699721064. The cubic root of 83213985 is about 436.5816119975.

The spelling of 83213985 in words is "eighty-three million, two hundred thirteen thousand, nine hundred eighty-five".