11971499 has 2 divisors, whose sum is σ = 11971500. Its totient is φ = 11971498.

The previous prime is 11971469. The next prime is 11971517. The reversal of 11971499 is 99417911.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11971499 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11971409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5985749 + 5985750.

It is an arithmetic number, because the mean of its divisors is an integer number (5985750).

Almost surely, 2^11971499 is an apocalyptic number.

11971499 is a deficient number, since it is larger than the sum of its proper divisors (1).

11971499 is an equidigital number, since it uses as much as digits as its factorization.

11971499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 41.

The square root of 11971499 is about 3459.9854045935. The cubic root of 11971499 is about 228.7614520429.

The spelling of 11971499 in words is "eleven million, nine hundred seventy-one thousand, four hundred ninety-nine".