83521797 has 8 divisors (see below), whose sum is σ = 114078720. Its totient is φ = 54323040.

The previous prime is 83521771. The next prime is 83521807. The reversal of 83521797 is 79712538.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83521797 - 2¹² = 83517701 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83521747) 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 7 ways as a sum of consecutive naturals, for example, 339397 + ... + 339642.

It is an arithmetic number, because the mean of its divisors is an integer number (14259840).

Almost surely, 2^83521797 is an apocalyptic number.

It is an amenable number.

83521797 is a deficient number, since it is larger than the sum of its proper divisors (30556923).

83521797 is a wasteful number, since it uses less digits than its factorization.

83521797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679083.

The product of its digits is 105840, while the sum is 42.

The square root of 83521797 is about 9139.0260421995. The cubic root of 83521797 is about 437.1192608081.

The spelling of 83521797 in words is "eighty-three million, five hundred twenty-one thousand, seven hundred ninety-seven".