93399521 has 4 divisors (see below), whose sum is σ = 94071600. Its totient is φ = 92727444.

The previous prime is 93399503. The next prime is 93399557. The reversal of 93399521 is 12599339.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12599339 = 3313 ⋅3803.

It is a cyclic number.

It is not a de Polignac number, because 93399521 - 2¹⁰ = 93398497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (93399571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335831 + ... + 336108.

It is an arithmetic number, because the mean of its divisors is an integer number (23517900).

Almost surely, 2^93399521 is an apocalyptic number.

It is an amenable number.

93399521 is a deficient number, since it is larger than the sum of its proper divisors (672079).

93399521 is a wasteful number, since it uses less digits than its factorization.

93399521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672078.

The product of its digits is 65610, while the sum is 41.

The square root of 93399521 is about 9664.3427608917. The cubic root of 93399521 is about 453.7133411987.

The spelling of 93399521 in words is "ninety-three million, three hundred ninety-nine thousand, five hundred twenty-one".