671431 has 2 divisors, whose sum is σ = 671432. Its totient is φ = 671430.

The previous prime is 671417. The next prime is 671443. The reversal of 671431 is 134176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671431 - 2⁷ = 671303 is a prime.

It is a super-2 number, since 2×671431² = 901639175522, which contains 22 as substring.

It is equal to p₅₄₄₁₈ and since 671431 and 54418 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335715 + 335716.

It is an arithmetic number, because the mean of its divisors is an integer number (335716).

2⁶⁷¹⁴³¹ is an apocalyptic number.

671431 is a deficient number, since it is larger than the sum of its proper divisors (1).

671431 is an equidigital number, since it uses as much as digits as its factorization.

671431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 671431 is about 819.4089333172. The cubic root of 671431 is about 87.5656541266.

The spelling of 671431 in words is "six hundred seventy-one thousand, four hundred thirty-one".