83921212 has 24 divisors (see below), whose sum is σ = 148523760. Its totient is φ = 41489280.

The previous prime is 83921191. The next prime is 83921239. The reversal of 83921212 is 21212938.

It is a super-3 number, since 3×83921212³ (a number of 25 digits) contains 333 as substring.

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, 221239 + ... + 221617.

It is an arithmetic number, because the mean of its divisors is an integer number (6188490).

Almost surely, 2^83921212 is an apocalyptic number.

It is an amenable number.

83921212 is a deficient number, since it is larger than the sum of its proper divisors (64602548).

83921212 is a wasteful number, since it uses less digits than its factorization.

83921212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 83921212 is about 9160.8521437692. The cubic root of 83921212 is about 437.8149451430.

It can be divided in two parts, 8392 and 1212, that added together give a square (9604 = 98²).

The spelling of 83921212 in words is "eighty-three million, nine hundred twenty-one thousand, two hundred twelve".