689690311 has 2 divisors, whose sum is σ = 689690312. Its totient is φ = 689690310.

The previous prime is 689690299. The next prime is 689690321. The reversal of 689690311 is 113096986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689690311 - 2⁵ = 689690279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689690321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344845155 + 344845156.

It is an arithmetic number, because the mean of its divisors is an integer number (344845156).

Almost surely, 2^689690311 is an apocalyptic number.

689690311 is a deficient number, since it is larger than the sum of its proper divisors (1).

689690311 is an equidigital number, since it uses as much as digits as its factorization.

689690311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 689690311 is about 26261.9555821725. The cubic root of 689690311 is about 883.5233703232.

The spelling of 689690311 in words is "six hundred eighty-nine million, six hundred ninety thousand, three hundred eleven".