138075569 has 4 divisors (see below), whose sum is σ = 138387696. Its totient is φ = 137763444.

The previous prime is 138075557. The next prime is 138075589. The reversal of 138075569 is 965570831.

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 a de Polignac number, because none of the positive numbers 2^k-138075569 is a prime.

It is a super-2 number, since 2×138075569² = 38129725509347522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138075529) 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, 155399 + ... + 156284.

It is an arithmetic number, because the mean of its divisors is an integer number (34596924).

Almost surely, 2^138075569 is an apocalyptic number.

It is an amenable number.

138075569 is a deficient number, since it is larger than the sum of its proper divisors (312127).

138075569 is an equidigital number, since it uses as much as digits as its factorization.

138075569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312126.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 138075569 is about 11750.5561144994. The cubic root of 138075569 is about 516.8592350977.

The spelling of 138075569 in words is "one hundred thirty-eight million, seventy-five thousand, five hundred sixty-nine".