69888009 has 4 divisors (see below), whose sum is σ = 93184016. Its totient is φ = 46592004.

The previous prime is 69887963. The next prime is 69888011. The reversal of 69888009 is 90088896.

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 not a de Polignac number, because 69888009 - 2⁹ = 69887497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69888059) 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, 11647999 + ... + 11648004.

It is an arithmetic number, because the mean of its divisors is an integer number (23296004).

Almost surely, 2^69888009 is an apocalyptic number.

It is an amenable number.

69888009 is a deficient number, since it is larger than the sum of its proper divisors (23296007).

69888009 is a wasteful number, since it uses less digits than its factorization.

69888009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23296006.

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 69888009 is about 8359.9048439561. The cubic root of 69888009 is about 411.9086284477.

The spelling of 69888009 in words is "sixty-nine million, eight hundred eighty-eight thousand, nine".