69844979989 has 4 divisors (see below), whose sum is σ = 70686485856. Its totient is φ = 69003474124.

The previous prime is 69844979987. The next prime is 69844979993. The reversal of 69844979989 is 98997944896.

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 69844979989 - 2¹ = 69844979987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69844979987) 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, 420752809 + ... + 420752974.

It is an arithmetic number, because the mean of its divisors is an integer number (17671621464).

Almost surely, 2^69844979989 is an apocalyptic number.

It is an amenable number.

69844979989 is a deficient number, since it is larger than the sum of its proper divisors (841505867).

69844979989 is an equidigital number, since it uses as much as digits as its factorization.

69844979989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841505866.

The product of its digits is 2539579392, while the sum is 82.

The spelling of 69844979989 in words is "sixty-nine billion, eight hundred forty-four million, nine hundred seventy-nine thousand, nine hundred eighty-nine".