38982161 has 2 divisors, whose sum is σ = 38982162. Its totient is φ = 38982160.

The previous prime is 38982149. The next prime is 38982169. The reversal of 38982161 is 16128983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29495761 + 9486400 = 5431^2 + 3080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38982161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38982169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19491080 + 19491081.

It is an arithmetic number, because the mean of its divisors is an integer number (19491081).

Almost surely, 2^38982161 is an apocalyptic number.

It is an amenable number.

38982161 is a deficient number, since it is larger than the sum of its proper divisors (1).

38982161 is an equidigital number, since it uses as much as digits as its factorization.

38982161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 38982161 is about 6243.5695719676. The cubic root of 38982161 is about 339.0694305860.

The spelling of 38982161 in words is "thirty-eight million, nine hundred eighty-two thousand, one hundred sixty-one".