38390609 has 2 divisors, whose sum is σ = 38390610. Its totient is φ = 38390608.

The previous prime is 38390593. The next prime is 38390629. The reversal of 38390609 is 90609383.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38093584 + 297025 = 6172^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 38390609 - 2⁴ = 38390593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (38390629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19195304 + 19195305.

It is an arithmetic number, because the mean of its divisors is an integer number (19195305).

Almost surely, 2^38390609 is an apocalyptic number.

It is an amenable number.

38390609 is a deficient number, since it is larger than the sum of its proper divisors (1).

38390609 is an equidigital number, since it uses as much as digits as its factorization.

38390609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 38390609 is about 6196.0155745447. The cubic root of 38390609 is about 337.3455615307.

The spelling of 38390609 in words is "thirty-eight million, three hundred ninety thousand, six hundred nine".