47363979581 has 2 divisors, whose sum is σ = 47363979582. Its totient is φ = 47363979580.

The previous prime is 47363979563. The next prime is 47363979587. The reversal of 47363979581 is 18597936374.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36219799225 + 11144180356 = 190315^2 + 105566^2 .

It is a cyclic number.

It is not a de Polignac number, because 47363979581 - 2¹⁸ = 47363717437 is a prime.

It is a super-2 number, since 2×47363979581² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47363979587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23681989790 + 23681989791.

It is an arithmetic number, because the mean of its divisors is an integer number (23681989791).

Almost surely, 2^47363979581 is an apocalyptic number.

It is an amenable number.

47363979581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47363979581 is an equidigital number, since it uses as much as digits as its factorization.

47363979581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34292160, while the sum is 62.

The spelling of 47363979581 in words is "forty-seven billion, three hundred sixty-three million, nine hundred seventy-nine thousand, five hundred eighty-one".