83391147 has 64 divisors (see below), whose sum is σ = 149585920. Its totient is φ = 44906400.

The previous prime is 83391083. The next prime is 83391157. The reversal of 83391147 is 74119338.

It is a happy number.

It is not a de Polignac number, because 83391147 - 2⁶ = 83391083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83391157) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 251772 + ... + 252102.

It is an arithmetic number, because the mean of its divisors is an integer number (2337280).

Almost surely, 2^83391147 is an apocalyptic number.

83391147 is a deficient number, since it is larger than the sum of its proper divisors (66194773).

83391147 is a wasteful number, since it uses less digits than its factorization.

83391147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 415 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 83391147 is about 9131.8753276641. The cubic root of 83391147 is about 436.8912187978.

It can be divided in two parts, 83391 and 147, that added together give a palindrome (83538).

The spelling of 83391147 in words is "eighty-three million, three hundred ninety-one thousand, one hundred forty-seven".