11406991 has 2 divisors, whose sum is σ = 11406992. Its totient is φ = 11406990.

The previous prime is 11406971. The next prime is 11407003. The reversal of 11406991 is 19960411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11406991 - 2¹³ = 11398799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11406961) 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, 5703495 + 5703496.

It is an arithmetic number, because the mean of its divisors is an integer number (5703496).

Almost surely, 2^11406991 is an apocalyptic number.

11406991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11406991 is an equidigital number, since it uses as much as digits as its factorization.

11406991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11406991 is about 3377.4237223067. The cubic root of 11406991 is about 225.1077081024.

The spelling of 11406991 in words is "eleven million, four hundred six thousand, nine hundred ninety-one".