69446840989 has 2 divisors, whose sum is σ = 69446840990. Its totient is φ = 69446840988.

The previous prime is 69446840971. The next prime is 69446840993. The reversal of 69446840989 is 98904864496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49877628889 + 19569212100 = 223333^2 + 139890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69446840989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69446840189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34723420494 + 34723420495.

It is an arithmetic number, because the mean of its divisors is an integer number (34723420495).

Almost surely, 2^69446840989 is an apocalyptic number.

It is an amenable number.

69446840989 is a deficient number, since it is larger than the sum of its proper divisors (1).

69446840989 is an equidigital number, since it uses as much as digits as its factorization.

69446840989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 69446840989 in words is "sixty-nine billion, four hundred forty-six million, eight hundred forty thousand, nine hundred eighty-nine".