47927956690981 has 2 divisors, whose sum is σ = 47927956690982. Its totient is φ = 47927956690980.

The previous prime is 47927956690961. The next prime is 47927956691039. The reversal of 47927956690981 is 18909665972974.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47377533661956 + 550423029025 = 6883134^2 + 741905^2 .

It is a cyclic number.

It is not a de Polignac number, because 47927956690981 - 2⁷ = 47927956690853 is a prime.

It is a super-2 number, since 2×47927956690981² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47927956690895 and 47927956690904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47927956690931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23963978345490 + 23963978345491.

It is an arithmetic number, because the mean of its divisors is an integer number (23963978345491).

Almost surely, 2^{47927956690981} is an apocalyptic number.

It is an amenable number.

47927956690981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47927956690981 is an equidigital number, since it uses as much as digits as its factorization.

47927956690981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3703553280, while the sum is 82.

The spelling of 47927956690981 in words is "forty-seven trillion, nine hundred twenty-seven billion, nine hundred fifty-six million, six hundred ninety thousand, nine hundred eighty-one".