38661761 has 2 divisors, whose sum is σ = 38661762. Its totient is φ = 38661760.

The previous prime is 38661737. The next prime is 38661769. The reversal of 38661761 is 16716683.

38661761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35331136 + 3330625 = 5944^2 + 1825^2 .

It is an emirp because it is prime and its reverse (16716683) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38661761 is a prime.

It is a super-2 number, since 2×38661761² = 2989463527242242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38661769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19330880 + 19330881.

It is an arithmetic number, because the mean of its divisors is an integer number (19330881).

Almost surely, 2^38661761 is an apocalyptic number.

It is an amenable number.

38661761 is a deficient number, since it is larger than the sum of its proper divisors (1).

38661761 is an equidigital number, since it uses as much as digits as its factorization.

38661761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 38661761 is about 6217.8582325428. The cubic root of 38661761 is about 338.1379203257.

The spelling of 38661761 in words is "thirty-eight million, six hundred sixty-one thousand, seven hundred sixty-one".