83977812 has 36 divisors (see below), whose sum is σ = 213909696. Its totient is φ = 27777360.

The previous prime is 83977781. The next prime is 83977889. The reversal of 83977812 is 21877938.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4188 + ... + 13619.

It is an arithmetic number, because the mean of its divisors is an integer number (5941936).

Almost surely, 2^83977812 is an apocalyptic number.

It is an amenable number.

83977812 is an abundant number, since it is smaller than the sum of its proper divisors (129931884).

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

83977812 is a wasteful number, since it uses less digits than its factorization.

83977812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17948 (or 17943 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 83977812 is about 9163.9408553307. The cubic root of 83977812 is about 437.9133499698.

The spelling of 83977812 in words is "eighty-three million, nine hundred seventy-seven thousand, eight hundred twelve".