69928734989 has 2 divisors, whose sum is σ = 69928734990. Its totient is φ = 69928734988.

The previous prime is 69928734979. The next prime is 69928735049. The reversal of 69928734989 is 98943782996.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68679112489 + 1249622500 = 262067^2 + 35350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69928734989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69928734919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34964367494 + 34964367495.

It is an arithmetic number, because the mean of its divisors is an integer number (34964367495).

Almost surely, 2^69928734989 is an apocalyptic number.

It is an amenable number.

69928734989 is a deficient number, since it is larger than the sum of its proper divisors (1).

69928734989 is an equidigital number, since it uses as much as digits as its factorization.

69928734989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423263232, while the sum is 74.

The spelling of 69928734989 in words is "sixty-nine billion, nine hundred twenty-eight million, seven hundred thirty-four thousand, nine hundred eighty-nine".