83121084 has 18 divisors (see below), whose sum is σ = 210111720. Its totient is φ = 27707016.

The previous prime is 83121083. The next prime is 83121113. The reversal of 83121084 is 48012138.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×83121084² = 13818229210670112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83121083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1154424 + ... + 1154495.

Almost surely, 2^83121084 is an apocalyptic number.

It is an amenable number.

83121084 is an abundant number, since it is smaller than the sum of its proper divisors (126990636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83121084 is a wasteful number, since it uses less digits than its factorization.

83121084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308929 (or 2308924 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 83121084 is about 9117.0765051084. The cubic root of 83121084 is about 436.4190833425.

The spelling of 83121084 in words is "eighty-three million, one hundred twenty-one thousand, eighty-four".