67386409 has 4 divisors (see below), whose sum is σ = 67532416. Its totient is φ = 67240404.

The previous prime is 67386377. The next prime is 67386413. The reversal of 67386409 is 90468376.

It is a happy number.

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 67386409 - 2⁵ = 67386377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67386469) 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, 72309 + ... + 73234.

It is an arithmetic number, because the mean of its divisors is an integer number (16883104).

Almost surely, 2^67386409 is an apocalyptic number.

It is an amenable number.

67386409 is a deficient number, since it is larger than the sum of its proper divisors (146007).

67386409 is a wasteful number, since it uses less digits than its factorization.

67386409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146006.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 67386409 is about 8208.9225236934. The cubic root of 67386409 is about 406.9341191330.

The spelling of 67386409 in words is "sixty-seven million, three hundred eighty-six thousand, four hundred nine".