47833187981 has 2 divisors, whose sum is σ = 47833187982. Its totient is φ = 47833187980.

The previous prime is 47833187939. The next prime is 47833187989. The reversal of 47833187981 is 18978133874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47041272100 + 791915881 = 216890^2 + 28141^2 .

It is a cyclic number.

It is not a de Polignac number, because 47833187981 - 2¹⁰ = 47833186957 is a prime.

It is a super-2 number, since 2×47833187981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47833187981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47833187989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23916593990 + 23916593991.

It is an arithmetic number, because the mean of its divisors is an integer number (23916593991).

Almost surely, 2^47833187981 is an apocalyptic number.

It is an amenable number.

47833187981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47833187981 is an equidigital number, since it uses as much as digits as its factorization.

47833187981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 59.

The spelling of 47833187981 in words is "forty-seven billion, eight hundred thirty-three million, one hundred eighty-seven thousand, nine hundred eighty-one".