11947291 has 2 divisors, whose sum is σ = 11947292. Its totient is φ = 11947290.

The previous prime is 11947283. The next prime is 11947297. The reversal of 11947291 is 19274911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11947291 - 2³ = 11947283 is a prime.

It is not a weakly prime, because it can be changed into another prime (11947297) 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, 5973645 + 5973646.

It is an arithmetic number, because the mean of its divisors is an integer number (5973646).

Almost surely, 2^11947291 is an apocalyptic number.

11947291 is a deficient number, since it is larger than the sum of its proper divisors (1).

11947291 is an equidigital number, since it uses as much as digits as its factorization.

11947291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 11947291 is about 3456.4853536504. The cubic root of 11947291 is about 228.6071523963.

The spelling of 11947291 in words is "eleven million, nine hundred forty-seven thousand, two hundred ninety-one".