9091393 has 4 divisors (see below), whose sum is σ = 9125460. Its totient is φ = 9057328.

The previous prime is 9091391. The next prime is 9091429. The reversal of 9091393 is 3931909.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1871424 + 7219969 = 1368^2 + 2687^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091393 - 2¹ = 9091391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9091391) 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, 16630 + ... + 17167.

It is an arithmetic number, because the mean of its divisors is an integer number (2281365).

Almost surely, 2^9091393 is an apocalyptic number.

It is an amenable number.

9091393 is a deficient number, since it is larger than the sum of its proper divisors (34067).

9091393 is a wasteful number, since it uses less digits than its factorization.

9091393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34066.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 9091393 is about 3015.1936919541. The cubic root of 9091393 is about 208.7101053239.

The spelling of 9091393 in words is "nine million, ninety-one thousand, three hundred ninety-three".