690271 has 2 divisors, whose sum is σ = 690272. Its totient is φ = 690270.

The previous prime is 690269. The next prime is 690281. The reversal of 690271 is 172096.

690271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690271 - 2¹ = 690269 is a prime.

Together with 690269, 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 (690281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345135 + 345136.

It is an arithmetic number, because the mean of its divisors is an integer number (345136).

2⁶⁹⁰²⁷¹ is an apocalyptic number.

690271 is a deficient number, since it is larger than the sum of its proper divisors (1).

690271 is an equidigital number, since it uses as much as digits as its factorization.

690271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 690271 is about 830.8254931091. The cubic root of 690271 is about 88.3771263410.

It can be divided in two parts, 690 and 271, that added together give a square (961 = 31²).

The spelling of 690271 in words is "six hundred ninety thousand, two hundred seventy-one".