69139079809 has 4 divisors (see below), whose sum is σ = 69146414080. Its totient is φ = 69131745540.

The previous prime is 69139079783. The next prime is 69139079819. The reversal of 69139079809 is 90897093196.

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 69139079809 - 2⁹ = 69139079297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69139079819) 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, 3652977 + ... + 3671854.

It is an arithmetic number, because the mean of its divisors is an integer number (17286603520).

Almost surely, 2^69139079809 is an apocalyptic number.

It is an amenable number.

69139079809 is a deficient number, since it is larger than the sum of its proper divisors (7334271).

69139079809 is an equidigital number, since it uses as much as digits as its factorization.

69139079809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334270.

The product of its (nonzero) digits is 6613488, while the sum is 61.

The spelling of 69139079809 in words is "sixty-nine billion, one hundred thirty-nine million, seventy-nine thousand, eight hundred nine".