689435519 has 2 divisors, whose sum is σ = 689435520. Its totient is φ = 689435518.

The previous prime is 689435491. The next prime is 689435521. The reversal of 689435519 is 915534986.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689435519 is a prime.

It is a super-2 number, since 2×689435519² = 950642669717598722, which contains 22 as substring.

Together with 689435521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689435569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344717759 + 344717760.

It is an arithmetic number, because the mean of its divisors is an integer number (344717760).

Almost surely, 2^689435519 is an apocalyptic number.

689435519 is a deficient number, since it is larger than the sum of its proper divisors (1).

689435519 is an equidigital number, since it uses as much as digits as its factorization.

689435519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 689435519 is about 26257.1041624929. The cubic root of 689435519 is about 883.4145570341.

The spelling of 689435519 in words is "six hundred eighty-nine million, four hundred thirty-five thousand, five hundred nineteen".