671958853 has 2 divisors, whose sum is σ = 671958854. Its totient is φ = 671958852.

The previous prime is 671958809. The next prime is 671958899. The reversal of 671958853 is 358859176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389786049 + 282172804 = 19743^2 + 16798^2 .

It is a cyclic number.

It is not a de Polignac number, because 671958853 - 2⁹ = 671958341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671958853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671958803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335979426 + 335979427.

It is an arithmetic number, because the mean of its divisors is an integer number (335979427).

Almost surely, 2^671958853 is an apocalyptic number.

It is an amenable number.

671958853 is a deficient number, since it is larger than the sum of its proper divisors (1).

671958853 is an equidigital number, since it uses as much as digits as its factorization.

671958853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The square root of 671958853 is about 25922.1691414897. The cubic root of 671958853 is about 875.8859502244.

The spelling of 671958853 in words is "six hundred seventy-one million, nine hundred fifty-eight thousand, eight hundred fifty-three".