69638009 has 4 divisors (see below), whose sum is σ = 79586304. Its totient is φ = 59689716.

The previous prime is 69638003. The next prime is 69638011. The reversal of 69638009 is 90083696.

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 69638009 - 2⁴ = 69637993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69638003) 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, 4974137 + ... + 4974150.

It is an arithmetic number, because the mean of its divisors is an integer number (19896576).

Almost surely, 2^69638009 is an apocalyptic number.

It is an amenable number.

69638009 is a deficient number, since it is larger than the sum of its proper divisors (9948295).

69638009 is an equidigital number, since it uses as much as digits as its factorization.

69638009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948294.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 69638009 is about 8344.9391250027. The cubic root of 69638009 is about 411.4168884412.

The spelling of 69638009 in words is "sixty-nine million, six hundred thirty-eight thousand, nine".