689818711 has 2 divisors, whose sum is σ = 689818712. Its totient is φ = 689818710.

The previous prime is 689818637. The next prime is 689818729. The reversal of 689818711 is 117818986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689818711 - 2¹¹ = 689816663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689818111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344909355 + 344909356.

It is an arithmetic number, because the mean of its divisors is an integer number (344909356).

Almost surely, 2^689818711 is an apocalyptic number.

689818711 is a deficient number, since it is larger than the sum of its proper divisors (1).

689818711 is an equidigital number, since it uses as much as digits as its factorization.

689818711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 49.

The square root of 689818711 is about 26264.4000692953. The cubic root of 689818711 is about 883.5781955879.

The spelling of 689818711 in words is "six hundred eighty-nine million, eight hundred eighteen thousand, seven hundred eleven".