10393991 has 2 divisors, whose sum is σ = 10393992. Its totient is φ = 10393990.

The previous prime is 10393967. The next prime is 10394047. The reversal of 10393991 is 19939301.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10393991 - 2⁶ = 10393927 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10393921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5196995 + 5196996.

It is an arithmetic number, because the mean of its divisors is an integer number (5196996).

Almost surely, 2^10393991 is an apocalyptic number.

10393991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10393991 is an equidigital number, since it uses as much as digits as its factorization.

10393991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 10393991 is about 3223.9713088053. The cubic root of 10393991 is about 218.2365288986.

The spelling of 10393991 in words is "ten million, three hundred ninety-three thousand, nine hundred ninety-one".