69423865921 has 2 divisors, whose sum is σ = 69423865922. Its totient is φ = 69423865920.

The previous prime is 69423865913. The next prime is 69423865933. The reversal of 69423865921 is 12956832496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58885816896 + 10538049025 = 242664^2 + 102655^2 .

It is a cyclic number.

It is not a de Polignac number, because 69423865921 - 2³ = 69423865913 is a prime.

It is not a weakly prime, because it can be changed into another prime (69423565921) 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, 34711932960 + 34711932961.

It is an arithmetic number, because the mean of its divisors is an integer number (34711932961).

Almost surely, 2^69423865921 is an apocalyptic number.

It is an amenable number.

69423865921 is a deficient number, since it is larger than the sum of its proper divisors (1).

69423865921 is an equidigital number, since it uses as much as digits as its factorization.

69423865921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5598720, while the sum is 55.

The spelling of 69423865921 in words is "sixty-nine billion, four hundred twenty-three million, eight hundred sixty-five thousand, nine hundred twenty-one".