38431609 has 4 divisors (see below), whose sum is σ = 38505616. Its totient is φ = 38357604.

The previous prime is 38431553. The next prime is 38431633. The reversal of 38431609 is 90613483.

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 not a de Polignac number, because 38431609 - 2⁹ = 38431097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38431649) 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, 36219 + ... + 37264.

It is an arithmetic number, because the mean of its divisors is an integer number (9626404).

Almost surely, 2^38431609 is an apocalyptic number.

It is an amenable number.

38431609 is a deficient number, since it is larger than the sum of its proper divisors (74007).

38431609 is an equidigital number, since it uses as much as digits as its factorization.

38431609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74006.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 38431609 is about 6199.3232695190. The cubic root of 38431609 is about 337.4656103963.

The spelling of 38431609 in words is "thirty-eight million, four hundred thirty-one thousand, six hundred nine".