38942209 has 4 divisors (see below), whose sum is σ = 39523504. Its totient is φ = 38360916.

The previous prime is 38942207. The next prime is 38942249. The reversal of 38942209 is 90224983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38942209 - 2¹ = 38942207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38942203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290547 + ... + 290680.

It is an arithmetic number, because the mean of its divisors is an integer number (9880876).

Almost surely, 2^38942209 is an apocalyptic number.

It is an amenable number.

38942209 is a deficient number, since it is larger than the sum of its proper divisors (581295).

38942209 is an equidigital number, since it uses as much as digits as its factorization.

38942209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581294.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 38942209 is about 6240.3692999694. The cubic root of 38942209 is about 338.9535559395.

The spelling of 38942209 in words is "thirty-eight million, nine hundred forty-two thousand, two hundred nine".