38864909 has 2 divisors, whose sum is σ = 38864910. Its totient is φ = 38864908.

The previous prime is 38864809. The next prime is 38864927. The reversal of 38864909 is 90946883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38167684 + 697225 = 6178^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 38864909 - 2²⁰ = 37816333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38864939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19432454 + 19432455.

It is an arithmetic number, because the mean of its divisors is an integer number (19432455).

Almost surely, 2^38864909 is an apocalyptic number.

It is an amenable number.

38864909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38864909 is an equidigital number, since it uses as much as digits as its factorization.

38864909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 38864909 is about 6234.1726796745. The cubic root of 38864909 is about 338.7291339389.

The spelling of 38864909 in words is "thirty-eight million, eight hundred sixty-four thousand, nine hundred nine".