11001391 has 2 divisors, whose sum is σ = 11001392. Its totient is φ = 11001390.

The previous prime is 11001377. The next prime is 11001413. The reversal of 11001391 is 19310011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11001391 - 2⁹ = 11000879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500695 + 5500696.

It is an arithmetic number, because the mean of its divisors is an integer number (5500696).

Almost surely, 2^11001391 is an apocalyptic number.

11001391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001391 is an equidigital number, since it uses as much as digits as its factorization.

11001391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 11001391 is about 3316.8344848666. The cubic root of 11001391 is about 222.4073830749.

The spelling of 11001391 in words is "eleven million, one thousand, three hundred ninety-one".