83191908 has 12 divisors (see below), whose sum is σ = 194114480. Its totient is φ = 27730632.

The previous prime is 83191903. The next prime is 83191921. The reversal of 83191908 is 80919138.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (83191903) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3466318 + ... + 3466341.

Almost surely, 2^83191908 is an apocalyptic number.

It is an amenable number.

83191908 is an abundant number, since it is smaller than the sum of its proper divisors (110922572).

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

83191908 is a wasteful number, since it uses less digits than its factorization.

83191908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932666 (or 6932664 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 83191908 is about 9120.9598179139. The cubic root of 83191908 is about 436.5429996386.

The spelling of 83191908 in words is "eighty-three million, one hundred ninety-one thousand, nine hundred eight".