10111993 has 2 divisors, whose sum is σ = 10111994. Its totient is φ = 10111992.

The previous prime is 10111949. The next prime is 10112027. The reversal of 10111993 is 39911101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8952064 + 1159929 = 2992^2 + 1077^2 .

It is an emirp because it is prime and its reverse (39911101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10111993 - 2²¹ = 8014841 is a prime.

It is not a weakly prime, because it can be changed into another prime (10111903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055996 + 5055997.

It is an arithmetic number, because the mean of its divisors is an integer number (5055997).

Almost surely, 2^10111993 is an apocalyptic number.

It is an amenable number.

10111993 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111993 is an equidigital number, since it uses as much as digits as its factorization.

10111993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 10111993 is about 3179.9360056454. The cubic root of 10111993 is about 216.2447571317.

The spelling of 10111993 in words is "ten million, one hundred eleven thousand, nine hundred ninety-three".