671105653 has 2 divisors, whose sum is σ = 671105654. Its totient is φ = 671105652.

The previous prime is 671105647. The next prime is 671105681. The reversal of 671105653 is 356501176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666517489 + 4588164 = 25817^2 + 2142^2 .

It is a cyclic number.

It is not a de Polignac number, because 671105653 - 2²⁹ = 134234741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671105623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335552826 + 335552827.

It is an arithmetic number, because the mean of its divisors is an integer number (335552827).

Almost surely, 2^671105653 is an apocalyptic number.

It is an amenable number.

671105653 is a deficient number, since it is larger than the sum of its proper divisors (1).

671105653 is an equidigital number, since it uses as much as digits as its factorization.

671105653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 671105653 is about 25905.7069581203. The cubic root of 671105653 is about 875.5150830686.

The spelling of 671105653 in words is "six hundred seventy-one million, one hundred five thousand, six hundred fifty-three".