83191320 has 64 divisors (see below), whose sum is σ = 277308000. Its totient is φ = 22184064.

The previous prime is 83191301. The next prime is 83191333. The reversal of 83191320 is 2319138.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37435 + ... + 39594.

Almost surely, 2^83191320 is an apocalyptic number.

It is an amenable number.

83191320 is an abundant number, since it is smaller than the sum of its proper divisors (194116680).

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

83191320 is a wasteful number, since it uses less digits than its factorization.

83191320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77049 (or 77039 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 83191320 is about 9120.9275844072. The cubic root of 83191320 is about 436.5419711416.

The spelling of 83191320 in words is "eighty-three million, one hundred ninety-one thousand, three hundred twenty".