47294351981 has 2 divisors, whose sum is σ = 47294351982. Its totient is φ = 47294351980.

The previous prime is 47294351971. The next prime is 47294352097. The reversal of 47294351981 is 18915349274.

47294351981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34918901956 + 12375450025 = 186866^2 + 111245^2 .

It is a cyclic number.

It is not a de Polignac number, because 47294351981 - 2²⁶ = 47227243117 is a prime.

It is a super-2 number, since 2×47294351981² (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 (47294351941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23647175990 + 23647175991.

It is an arithmetic number, because the mean of its divisors is an integer number (23647175991).

Almost surely, 2^47294351981 is an apocalyptic number.

It is an amenable number.

47294351981 is a deficient number, since it is larger than the sum of its proper divisors (1).

47294351981 is an equidigital number, since it uses as much as digits as its factorization.

47294351981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The spelling of 47294351981 in words is "forty-seven billion, two hundred ninety-four million, three hundred fifty-one thousand, nine hundred eighty-one".