83821012 has 12 divisors (see below), whose sum is σ = 160022016. Its totient is φ = 38100440.

The previous prime is 83820977. The next prime is 83821013. The reversal of 83821012 is 21012838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83821013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952468 + ... + 952555.

It is an arithmetic number, because the mean of its divisors is an integer number (13335168).

Almost surely, 2^83821012 is an apocalyptic number.

It is an amenable number.

83821012 is a deficient number, since it is larger than the sum of its proper divisors (76201004).

83821012 is a wasteful number, since it uses less digits than its factorization.

83821012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905038 (or 1905036 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 83821012 is about 9155.3815868046. The cubic root of 83821012 is about 437.6406287510.

The spelling of 83821012 in words is "eighty-three million, eight hundred twenty-one thousand, twelve".