9693991 has 2 divisors, whose sum is σ = 9693992. Its totient is φ = 9693990.

The previous prime is 9693989. The next prime is 9694007. The reversal of 9693991 is 1993969.

9693991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1993969) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9693991 - 2¹ = 9693989 is a prime.

Together with 9693989, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9694991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4846995 + 4846996.

It is an arithmetic number, because the mean of its divisors is an integer number (4846996).

Almost surely, 2^9693991 is an apocalyptic number.

9693991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9693991 is an equidigital number, since it uses as much as digits as its factorization.

9693991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 118098, while the sum is 46.

The square root of 9693991 is about 3113.5174642195. The cubic root of 9693991 is about 213.2230758920.

The spelling of 9693991 in words is "nine million, six hundred ninety-three thousand, nine hundred ninety-one".