9940993 has 4 divisors (see below), whose sum is σ = 10060848. Its totient is φ = 9821140.

The previous prime is 9940963. The next prime is 9941003. The reversal of 9940993 is 3990499.

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: 3990499 = 263 ⋅15173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9940993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9940963) 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, 59803 + ... + 59968.

It is an arithmetic number, because the mean of its divisors is an integer number (2515212).

It is a Proth number, since it is equal to 2427 ⋅ 2¹² + 1 and 2427 < 2¹².

Almost surely, 2^9940993 is an apocalyptic number.

It is an amenable number.

9940993 is a deficient number, since it is larger than the sum of its proper divisors (119855).

9940993 is a wasteful number, since it uses less digits than its factorization.

9940993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119854.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 9940993 is about 3152.9340303914. The cubic root of 9940993 is about 215.0188770157.

The spelling of 9940993 in words is "nine million, nine hundred forty thousand, nine hundred ninety-three".