38613661 has 2 divisors, whose sum is σ = 38613662. Its totient is φ = 38613660.

The previous prime is 38613599. The next prime is 38613667. The reversal of 38613661 is 16631683.

It is a happy number.

38613661 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., 38514436 + 99225 = 6206^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 38613661 - 2²³ = 30225053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38613667) 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, 19306830 + 19306831.

It is an arithmetic number, because the mean of its divisors is an integer number (19306831).

Almost surely, 2^38613661 is an apocalyptic number.

It is an amenable number.

38613661 is a deficient number, since it is larger than the sum of its proper divisors (1).

38613661 is an equidigital number, since it uses as much as digits as its factorization.

38613661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 38613661 is about 6213.9891374221. The cubic root of 38613661 is about 337.9976337031.

The spelling of 38613661 in words is "thirty-eight million, six hundred thirteen thousand, six hundred sixty-one".