656471 has 2 divisors, whose sum is σ = 656472. Its totient is φ = 656470.

The previous prime is 656459. The next prime is 656479. The reversal of 656471 is 174656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656471 - 2⁶ = 656407 is a prime.

It is a super-3 number, since 3×656471³ = 848726752366725333, which contains 333 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328235 + 328236.

It is an arithmetic number, because the mean of its divisors is an integer number (328236).

2⁶⁵⁶⁴⁷¹ is an apocalyptic number.

656471 is a deficient number, since it is larger than the sum of its proper divisors (1).

656471 is an equidigital number, since it uses as much as digits as its factorization.

656471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 656471 is about 810.2289799804. The cubic root of 656471 is about 86.9104199720.

The spelling of 656471 in words is "six hundred fifty-six thousand, four hundred seventy-one".