93390921 has 48 divisors (see below), whose sum is σ = 152080320. Its totient is φ = 56609280.

The previous prime is 93390919. The next prime is 93390937. The reversal of 93390921 is 12909339.

It is not a de Polignac number, because 93390921 - 2¹ = 93390919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (93390221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 442506 + ... + 442716.

It is an arithmetic number, because the mean of its divisors is an integer number (3168340).

Almost surely, 2^93390921 is an apocalyptic number.

It is an amenable number.

93390921 is a deficient number, since it is larger than the sum of its proper divisors (58689399).

93390921 is a wasteful number, since it uses less digits than its factorization.

93390921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 93390921 is about 9663.8978160988. The cubic root of 93390921 is about 453.6994151655.

The spelling of 93390921 in words is "ninety-three million, three hundred ninety thousand, nine hundred twenty-one".