38609861 has 2 divisors, whose sum is σ = 38609862. Its totient is φ = 38609860.

The previous prime is 38609819. The next prime is 38609897. The reversal of 38609861 is 16890683.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31292836 + 7317025 = 5594^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 38609861 - 2⁶ = 38609797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38609561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19304930 + 19304931.

It is an arithmetic number, because the mean of its divisors is an integer number (19304931).

Almost surely, 2^38609861 is an apocalyptic number.

It is an amenable number.

38609861 is a deficient number, since it is larger than the sum of its proper divisors (1).

38609861 is an equidigital number, since it uses as much as digits as its factorization.

38609861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 38609861 is about 6213.6833681803. The cubic root of 38609861 is about 337.9865458039.

The spelling of 38609861 in words is "thirty-eight million, six hundred nine thousand, eight hundred sixty-one".