38947365841 has 2 divisors, whose sum is σ = 38947365842. Its totient is φ = 38947365840.

The previous prime is 38947365781. The next prime is 38947365881. The reversal of 38947365841 is 14856374983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35864784400 + 3082581441 = 189380^2 + 55521^2 .

It is a cyclic number.

It is not a de Polignac number, because 38947365841 - 2³¹ = 36799882193 is a prime.

It is not a weakly prime, because it can be changed into another prime (38947365881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19473682920 + 19473682921.

It is an arithmetic number, because the mean of its divisors is an integer number (19473682921).

Almost surely, 2^38947365841 is an apocalyptic number.

It is an amenable number.

38947365841 is a deficient number, since it is larger than the sum of its proper divisors (1).

38947365841 is an equidigital number, since it uses as much as digits as its factorization.

38947365841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 58.

The spelling of 38947365841 in words is "thirty-eight billion, nine hundred forty-seven million, three hundred sixty-five thousand, eight hundred forty-one".