83968215 has 16 divisors (see below), whose sum is σ = 134483328. Its totient is φ = 44738336.

The previous prime is 83968211. The next prime is 83968217. The reversal of 83968215 is 51286938.

It is a cyclic number.

It is not a de Polignac number, because 83968215 - 2² = 83968211 is a prime.

It is a super-2 number, since 2×83968215² = 14101322260572450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83968211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17464 + ... + 21746.

It is an arithmetic number, because the mean of its divisors is an integer number (8405208).

Almost surely, 2^83968215 is an apocalyptic number.

83968215 is a deficient number, since it is larger than the sum of its proper divisors (50515113).

83968215 is a wasteful number, since it uses less digits than its factorization.

83968215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5598.

The product of its digits is 103680, while the sum is 42.

The square root of 83968215 is about 9163.4172119357. The cubic root of 83968215 is about 437.8966677279.

The spelling of 83968215 in words is "eighty-three million, nine hundred sixty-eight thousand, two hundred fifteen".