9909993 has 8 divisors (see below), whose sum is σ = 13462848. Its totient is φ = 6481904.

The previous prime is 9909989. The next prime is 9910007. The reversal of 9909993 is 3999099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9909993 - 2² = 9909989 is a prime.

It is a super-2 number, since 2×9909993² = 196415922520098, which contains 22 as substring.

9909993 is a lucky number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (9909943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31005 + ... + 31322.

It is an arithmetic number, because the mean of its divisors is an integer number (1682856).

Almost surely, 2^9909993 is an apocalyptic number.

It is an amenable number.

9909993 is a deficient number, since it is larger than the sum of its proper divisors (3552855).

9909993 is a wasteful number, since it uses less digits than its factorization.

9909993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62383.

The product of its (nonzero) digits is 177147, while the sum is 48.

The square root of 9909993 is about 3148.0141359276. The cubic root of 9909993 is about 214.7951392774.

The spelling of 9909993 in words is "nine million, nine hundred nine thousand, nine hundred ninety-three".