689093590987 has 2 divisors, whose sum is σ = 689093590988. Its totient is φ = 689093590986.

The previous prime is 689093590973. The next prime is 689093590993. The reversal of 689093590987 is 789095390986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689093590987 - 2⁷ = 689093590859 is a prime.

It is not a weakly prime, because it can be changed into another prime (689093590937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344546795493 + 344546795494.

It is an arithmetic number, because the mean of its divisors is an integer number (344546795494).

Almost surely, 2^689093590987 is an apocalyptic number.

689093590987 is a deficient number, since it is larger than the sum of its proper divisors (1).

689093590987 is an equidigital number, since it uses as much as digits as its factorization.

689093590987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 689093590987 in words is "six hundred eighty-nine billion, ninety-three million, five hundred ninety thousand, nine hundred eighty-seven".