38629909 has 2 divisors, whose sum is σ = 38629910. Its totient is φ = 38629908.

The previous prime is 38629891. The next prime is 38629919. The reversal of 38629909 is 90992683.

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., 22829284 + 15800625 = 4778^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 38629909 - 2¹¹ = 38627861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38629919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19314954 + 19314955.

It is an arithmetic number, because the mean of its divisors is an integer number (19314955).

Almost surely, 2^38629909 is an apocalyptic number.

It is an amenable number.

38629909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38629909 is an equidigital number, since it uses as much as digits as its factorization.

38629909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 38629909 is about 6215.2963726600. The cubic root of 38629909 is about 338.0450350226.

The spelling of 38629909 in words is "thirty-eight million, six hundred twenty-nine thousand, nine hundred nine".