671767469 has 2 divisors, whose sum is σ = 671767470. Its totient is φ = 671767468.

The previous prime is 671767409. The next prime is 671767471. The reversal of 671767469 is 964767176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603291844 + 68475625 = 24562^2 + 8275^2 .

It is a cyclic number.

It is not a de Polignac number, because 671767469 - 2²⁴ = 654990253 is a prime.

It is a super-2 number, since 2×671767469² = 902543064813331922, which contains 22 as substring.

Together with 671767471, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671767469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671767409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335883734 + 335883735.

It is an arithmetic number, because the mean of its divisors is an integer number (335883735).

Almost surely, 2^671767469 is an apocalyptic number.

It is an amenable number.

671767469 is a deficient number, since it is larger than the sum of its proper divisors (1).

671767469 is an equidigital number, since it uses as much as digits as its factorization.

671767469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The square root of 671767469 is about 25918.4773665430. The cubic root of 671767469 is about 875.8027871591.

The spelling of 671767469 in words is "six hundred seventy-one million, seven hundred sixty-seven thousand, four hundred sixty-nine".