38722009 has 4 divisors (see below), whose sum is σ = 38968804. Its totient is φ = 38475216.

The previous prime is 38721983. The next prime is 38722027. The reversal of 38722009 is 90022783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26296384 + 12425625 = 5128^2 + 3525^2 .

It is a cyclic number.

It is not a de Polignac number, because 38722009 - 2¹³ = 38713817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38722309) 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, 123162 + ... + 123475.

It is an arithmetic number, because the mean of its divisors is an integer number (9742201).

Almost surely, 2^38722009 is an apocalyptic number.

It is an amenable number.

38722009 is a deficient number, since it is larger than the sum of its proper divisors (246795).

38722009 is a wasteful number, since it uses less digits than its factorization.

38722009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246794.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 38722009 is about 6222.7011016117. The cubic root of 38722009 is about 338.3134732910.

The spelling of 38722009 in words is "thirty-eight million, seven hundred twenty-two thousand, nine".