38135309 has 4 divisors (see below), whose sum is σ = 38760540. Its totient is φ = 37510080.

The previous prime is 38135297. The next prime is 38135327. The reversal of 38135309 is 90353183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90353183 = 29 ⋅3115627.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 18748900 = 4403^2 + 4330^2 .

It is a cyclic number.

It is not a de Polignac number, because 38135309 - 2²⁰ = 37086733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38135399) 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, 312524 + ... + 312645.

It is an arithmetic number, because the mean of its divisors is an integer number (9690135).

Almost surely, 2^38135309 is an apocalyptic number.

It is an amenable number.

38135309 is a deficient number, since it is larger than the sum of its proper divisors (625231).

38135309 is an equidigital number, since it uses as much as digits as its factorization.

38135309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625230.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 38135309 is about 6175.3792596083. The cubic root of 38135309 is about 336.5961079246.

The spelling of 38135309 in words is "thirty-eight million, one hundred thirty-five thousand, three hundred nine".