83257921 has 8 divisors (see below), whose sum is σ = 85617000. Its totient is φ = 80914560.

The previous prime is 83257919. The next prime is 83257931. The reversal of 83257921 is 12975238.

It can be written as a sum of positive squares in 4 ways, for example, as 83521 + 83174400 = 289^2 + 9120^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 83257921 - 2¹ = 83257919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83257931) 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, 7255 + ... + 14803.

It is an arithmetic number, because the mean of its divisors is an integer number (10702125).

Almost surely, 2^83257921 is an apocalyptic number.

It is an amenable number.

83257921 is a deficient number, since it is larger than the sum of its proper divisors (2359079).

83257921 is a wasteful number, since it uses less digits than its factorization.

83257921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its digits is 30240, while the sum is 37.

The square root of 83257921 is about 9124.5778532489. The cubic root of 83257921 is about 436.6584351212.

The spelling of 83257921 in words is "eighty-three million, two hundred fifty-seven thousand, nine hundred twenty-one".