38306861 has 2 divisors, whose sum is σ = 38306862. Its totient is φ = 38306860.

The previous prime is 38306819. The next prime is 38306881. The reversal of 38306861 is 16860383.

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., 30360100 + 7946761 = 5510^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 38306861 - 2¹⁰ = 38305837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38306881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19153430 + 19153431.

It is an arithmetic number, because the mean of its divisors is an integer number (19153431).

Almost surely, 2^38306861 is an apocalyptic number.

It is an amenable number.

38306861 is a deficient number, since it is larger than the sum of its proper divisors (1).

38306861 is an equidigital number, since it uses as much as digits as its factorization.

38306861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 38306861 is about 6189.2536706779. The cubic root of 38306861 is about 337.1000797543.

The spelling of 38306861 in words is "thirty-eight million, three hundred six thousand, eight hundred sixty-one".