69805609 has 4 divisors (see below), whose sum is σ = 69946000. Its totient is φ = 69665220.

The previous prime is 69805597. The next prime is 69805613. The reversal of 69805609 is 90650896.

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 69805609 - 2⁹ = 69805097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69805699) 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, 69447 + ... + 70444.

It is an arithmetic number, because the mean of its divisors is an integer number (17486500).

Almost surely, 2^69805609 is an apocalyptic number.

It is an amenable number.

69805609 is a deficient number, since it is larger than the sum of its proper divisors (140391).

69805609 is a wasteful number, since it uses less digits than its factorization.

69805609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140390.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 69805609 is about 8354.9751046906. The cubic root of 69805609 is about 411.7466806903.

The spelling of 69805609 in words is "sixty-nine million, eight hundred five thousand, six hundred nine".