93728321 has 2 divisors, whose sum is σ = 93728322. Its totient is φ = 93728320.

The previous prime is 93728317. The next prime is 93728329. The reversal of 93728321 is 12382739.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93702400 + 25921 = 9680^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 93728321 - 2² = 93728317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (93728329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46864160 + 46864161.

It is an arithmetic number, because the mean of its divisors is an integer number (46864161).

Almost surely, 2^93728321 is an apocalyptic number.

It is an amenable number.

93728321 is a deficient number, since it is larger than the sum of its proper divisors (1).

93728321 is an equidigital number, since it uses as much as digits as its factorization.

93728321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 93728321 is about 9681.3388020459. The cubic root of 93728321 is about 454.2451291910.

It can be divided in two parts, 93728 and 321, that added together give a palindrome (94049).

The spelling of 93728321 in words is "ninety-three million, seven hundred twenty-eight thousand, three hundred twenty-one".