11997456047 has 2 divisors, whose sum is σ = 11997456048. Its totient is φ = 11997456046.

The previous prime is 11997455989. The next prime is 11997456071. The reversal of 11997456047 is 74065479911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11997456047 - 2¹² = 11997451951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11997456047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11997456077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998728023 + 5998728024.

It is an arithmetic number, because the mean of its divisors is an integer number (5998728024).

Almost surely, 2^11997456047 is an apocalyptic number.

11997456047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11997456047 is an equidigital number, since it uses as much as digits as its factorization.

11997456047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 11997456047 in words is "eleven billion, nine hundred ninety-seven million, four hundred fifty-six thousand, forty-seven".