47961901919 has 2 divisors, whose sum is σ = 47961901920. Its totient is φ = 47961901918.

The previous prime is 47961901901. The next prime is 47961901921. The reversal of 47961901919 is 91910916974.

47961901919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47961901919 is a prime.

It is a super-2 number, since 2×47961901919² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 47961901921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47961901969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23980950959 + 23980950960.

It is an arithmetic number, because the mean of its divisors is an integer number (23980950960).

Almost surely, 2^47961901919 is an apocalyptic number.

47961901919 is a deficient number, since it is larger than the sum of its proper divisors (1).

47961901919 is an equidigital number, since it uses as much as digits as its factorization.

47961901919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 56.

The spelling of 47961901919 in words is "forty-seven billion, nine hundred sixty-one million, nine hundred one thousand, nine hundred nineteen".