38289509 has 2 divisors, whose sum is σ = 38289510. Its totient is φ = 38289508.

The previous prime is 38289499. The next prime is 38289521. The reversal of 38289509 is 90598283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31888609 + 6400900 = 5647^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 38289509 - 2¹² = 38285413 is a prime.

It is a super-2 number, since 2×38289509² = 2932172998922162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38289509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38289539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19144754 + 19144755.

It is an arithmetic number, because the mean of its divisors is an integer number (19144755).

Almost surely, 2^38289509 is an apocalyptic number.

It is an amenable number.

38289509 is a deficient number, since it is larger than the sum of its proper divisors (1).

38289509 is an equidigital number, since it uses as much as digits as its factorization.

38289509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 38289509 is about 6187.8517273768. The cubic root of 38289509 is about 337.0491729119.

The spelling of 38289509 in words is "thirty-eight million, two hundred eighty-nine thousand, five hundred nine".