689313271 has 2 divisors, whose sum is σ = 689313272. Its totient is φ = 689313270.

The previous prime is 689313239. The next prime is 689313301. The reversal of 689313271 is 172313986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689313271 - 2⁵ = 689313239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689313971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344656635 + 344656636.

It is an arithmetic number, because the mean of its divisors is an integer number (344656636).

Almost surely, 2^689313271 is an apocalyptic number.

689313271 is a deficient number, since it is larger than the sum of its proper divisors (1).

689313271 is an equidigital number, since it uses as much as digits as its factorization.

689313271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 689313271 is about 26254.7761559683. The cubic root of 689313271 is about 883.3623394138.

It can be divided in two parts, 6893 and 13271, that added together give a square (20164 = 142²).

The spelling of 689313271 in words is "six hundred eighty-nine million, three hundred thirteen thousand, two hundred seventy-one".