689476441939 has 2 divisors, whose sum is σ = 689476441940. Its totient is φ = 689476441938.

The previous prime is 689476441933. The next prime is 689476442009. The reversal of 689476441939 is 939144674986.

It is an a-pointer prime, because the next prime (689476442009) can be obtained adding 689476441939 to its sum of digits (70).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689476441939 - 2²⁷ = 689342224211 is a prime.

It is not a weakly prime, because it can be changed into another prime (689476441933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344738220969 + 344738220970.

It is an arithmetic number, because the mean of its divisors is an integer number (344738220970).

Almost surely, 2^689476441939 is an apocalyptic number.

689476441939 is a deficient number, since it is larger than the sum of its proper divisors (1).

689476441939 is an equidigital number, since it uses as much as digits as its factorization.

689476441939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282175488, while the sum is 70.

The spelling of 689476441939 in words is "six hundred eighty-nine billion, four hundred seventy-six million, four hundred forty-one thousand, nine hundred thirty-nine".