11975421959 has 2 divisors, whose sum is σ = 11975421960. Its totient is φ = 11975421958.

The previous prime is 11975421949. The next prime is 11975421989. The reversal of 11975421959 is 95912457911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11975421959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11975421959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11975421919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5987710979 + 5987710980.

It is an arithmetic number, because the mean of its divisors is an integer number (5987710980).

Almost surely, 2^11975421959 is an apocalyptic number.

11975421959 is a deficient number, since it is larger than the sum of its proper divisors (1).

11975421959 is an equidigital number, since it uses as much as digits as its factorization.

11975421959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 53.

The spelling of 11975421959 in words is "eleven billion, nine hundred seventy-five million, four hundred twenty-one thousand, nine hundred fifty-nine".