93399921 has 12 divisors (see below), whose sum is σ = 142847172. Its totient is φ = 58603776.

The previous prime is 93399919. The next prime is 93399947. The reversal of 93399921 is 12999339.

It can be written as a sum of positive squares in 2 ways, for example, as 81703521 + 11696400 = 9039^2 + 3420^2 .

It is not a de Polignac number, because 93399921 - 2¹ = 93399919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (93399121) 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 11 ways as a sum of consecutive naturals, for example, 305076 + ... + 305381.

It is an arithmetic number, because the mean of its divisors is an integer number (11903931).

Almost surely, 2^93399921 is an apocalyptic number.

It is an amenable number.

93399921 is a deficient number, since it is larger than the sum of its proper divisors (49447251).

93399921 is a wasteful number, since it uses less digits than its factorization.

93399921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610480 (or 610477 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 93399921 is about 9664.3634554998. The cubic root of 93399921 is about 453.7139889004.

The spelling of 93399921 in words is "ninety-three million, three hundred ninety-nine thousand, nine hundred twenty-one".