11990534971 has 2 divisors, whose sum is σ = 11990534972. Its totient is φ = 11990534970.

The previous prime is 11990534957. The next prime is 11990535019. The reversal of 11990534971 is 17943509911.

11990534971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11990534971 - 2⁵ = 11990534939 is a prime.

It is not a weakly prime, because it can be changed into another prime (11990534921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5995267485 + 5995267486.

It is an arithmetic number, because the mean of its divisors is an integer number (5995267486).

Almost surely, 2^11990534971 is an apocalyptic number.

11990534971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11990534971 is an equidigital number, since it uses as much as digits as its factorization.

11990534971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 49.

The spelling of 11990534971 in words is "eleven billion, nine hundred ninety million, five hundred thirty-four thousand, nine hundred seventy-one".