47919012421 has 6 divisors (see below), whose sum is σ = 55742524710. Its totient is φ = 41073439176.

The previous prime is 47919012419. The next prime is 47919012433. The reversal of 47919012421 is 12421091974.

It can be written as a sum of positive squares in only one way, i.e., 31857252196 + 16061760225 = 178486^2 + 126735^2 .

It is not a de Polignac number, because 47919012421 - 2¹ = 47919012419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47919012481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 488969466 + ... + 488969563.

It is an arithmetic number, because the mean of its divisors is an integer number (9290420785).

Almost surely, 2^47919012421 is an apocalyptic number.

It is an amenable number.

47919012421 is a deficient number, since it is larger than the sum of its proper divisors (7823512289).

47919012421 is an equidigital number, since it uses as much as digits as its factorization.

47919012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977939043 (or 977939036 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 47919012421 in words is "forty-seven billion, nine hundred nineteen million, twelve thousand, four hundred twenty-one".