11385991 has 2 divisors, whose sum is σ = 11385992. Its totient is φ = 11385990.

The previous prime is 11385961. The next prime is 11386003. The reversal of 11385991 is 19958311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11385991 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 11385991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11385901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5692995 + 5692996.

It is an arithmetic number, because the mean of its divisors is an integer number (5692996).

Almost surely, 2^11385991 is an apocalyptic number.

11385991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11385991 is an equidigital number, since it uses as much as digits as its factorization.

11385991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 37.

The square root of 11385991 is about 3374.3134116439. The cubic root of 11385991 is about 224.9694839272.

The spelling of 11385991 in words is "eleven million, three hundred eighty-five thousand, nine hundred ninety-one".