47424824921 has 2 divisors, whose sum is σ = 47424824922. Its totient is φ = 47424824920.

The previous prime is 47424824849. The next prime is 47424824929. The reversal of 47424824921 is 12942842474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32639480896 + 14785344025 = 180664^2 + 121595^2 .

It is a cyclic number.

It is not a de Polignac number, because 47424824921 - 2¹⁸ = 47424562777 is a prime.

It is a super-2 number, since 2×47424824921² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47424824929) 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, 23712412460 + 23712412461.

It is an arithmetic number, because the mean of its divisors is an integer number (23712412461).

Almost surely, 2^47424824921 is an apocalyptic number.

It is an amenable number.

47424824921 is a deficient number, since it is larger than the sum of its proper divisors (1).

47424824921 is an equidigital number, since it uses as much as digits as its factorization.

47424824921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 47.

The spelling of 47424824921 in words is "forty-seven billion, four hundred twenty-four million, eight hundred twenty-four thousand, nine hundred twenty-one".