689613271 has 2 divisors, whose sum is σ = 689613272. Its totient is φ = 689613270.

The previous prime is 689613269. The next prime is 689613277. The reversal of 689613271 is 172316986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689613271 - 2¹ = 689613269 is a prime.

Together with 689613269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689613277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344806635 + 344806636.

It is an arithmetic number, because the mean of its divisors is an integer number (344806636).

Almost surely, 2^689613271 is an apocalyptic number.

689613271 is a deficient number, since it is larger than the sum of its proper divisors (1).

689613271 is an equidigital number, since it uses as much as digits as its factorization.

689613271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 689613271 is about 26260.4887806758. The cubic root of 689613271 is about 883.4904718982.

The spelling of 689613271 in words is "six hundred eighty-nine million, six hundred thirteen thousand, two hundred seventy-one".