38475509 has 4 divisors (see below), whose sum is σ = 39201516. Its totient is φ = 37749504.

The previous prime is 38475499. The next prime is 38475511. The reversal of 38475509 is 90557483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90557483 = 6793 ⋅13331.

It can be written as a sum of positive squares in 2 ways, for example, as 35402500 + 3073009 = 5950^2 + 1753^2 .

It is a cyclic number.

It is not a de Polignac number, because 38475509 - 2²⁰ = 37426933 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 (38475559) 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, 362924 + ... + 363029.

It is an arithmetic number, because the mean of its divisors is an integer number (9800379).

Almost surely, 2^38475509 is an apocalyptic number.

It is an amenable number.

38475509 is a deficient number, since it is larger than the sum of its proper divisors (726007).

38475509 is an equidigital number, since it uses as much as digits as its factorization.

38475509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726006.

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 38475509 is about 6202.8629680173. The cubic root of 38475509 is about 337.5940559073.

The spelling of 38475509 in words is "thirty-eight million, four hundred seventy-five thousand, five hundred nine".