47740297981 has 2 divisors, whose sum is σ = 47740297982. Its totient is φ = 47740297980.

The previous prime is 47740297961. The next prime is 47740298029. The reversal of 47740297981 is 18979204774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42390692100 + 5349605881 = 205890^2 + 73141^2 .

It is a cyclic number.

It is not a de Polignac number, because 47740297981 - 2⁵ = 47740297949 is a prime.

It is a super-2 number, since 2×47740297981² (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 (47740297961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23870148990 + 23870148991.

It is an arithmetic number, because the mean of its divisors is an integer number (23870148991).

Almost surely, 2^47740297981 is an apocalyptic number.

It is an amenable number.

47740297981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47740297981 is an equidigital number, since it uses as much as digits as its factorization.

47740297981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 47740297981 in words is "forty-seven billion, seven hundred forty million, two hundred ninety-seven thousand, nine hundred eighty-one".