47983393981 has 2 divisors, whose sum is σ = 47983393982. Its totient is φ = 47983393980.

The previous prime is 47983393951. The next prime is 47983393993. The reversal of 47983393981 is 18939338974.

It is a happy number.

47983393981 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 can be written as a sum of positive squares in only one way, i.e., 33834291481 + 14149102500 = 183941^2 + 118950^2 .

It is a cyclic number.

It is not a de Polignac number, because 47983393981 - 2²⁷ = 47849176253 is a prime.

It is a super-2 number, since 2×47983393981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47983393951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23991696990 + 23991696991.

It is an arithmetic number, because the mean of its divisors is an integer number (23991696991).

Almost surely, 2^47983393981 is an apocalyptic number.

It is an amenable number.

47983393981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47983393981 is an equidigital number, since it uses as much as digits as its factorization.

47983393981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 64.

The spelling of 47983393981 in words is "forty-seven billion, nine hundred eighty-three million, three hundred ninety-three thousand, nine hundred eighty-one".