671954473 has 2 divisors, whose sum is σ = 671954474. Its totient is φ = 671954472.

The previous prime is 671954443. The next prime is 671954477. The reversal of 671954473 is 374459176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671431744 + 522729 = 25912^2 + 723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671954473 is a prime.

It is equal to p_34874488 and since 671954473 and 34874488 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (671954477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335977236 + 335977237.

It is an arithmetic number, because the mean of its divisors is an integer number (335977237).

Almost surely, 2^671954473 is an apocalyptic number.

It is an amenable number.

671954473 is a deficient number, since it is larger than the sum of its proper divisors (1).

671954473 is an equidigital number, since it uses as much as digits as its factorization.

671954473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

The square root of 671954473 is about 25922.0846576814. The cubic root of 671954473 is about 875.8840471372.

The spelling of 671954473 in words is "six hundred seventy-one million, nine hundred fifty-four thousand, four hundred seventy-three".