671761373 has 2 divisors, whose sum is σ = 671761374. Its totient is φ = 671761372.

The previous prime is 671761369. The next prime is 671761399. The reversal of 671761373 is 373167176.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399280324 + 272481049 = 19982^2 + 16507^2 .

It is a cyclic number.

It is not a de Polignac number, because 671761373 - 2² = 671761369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671761373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671761303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335880686 + 335880687.

It is an arithmetic number, because the mean of its divisors is an integer number (335880687).

Almost surely, 2^671761373 is an apocalyptic number.

It is an amenable number.

671761373 is a deficient number, since it is larger than the sum of its proper divisors (1).

671761373 is an equidigital number, since it uses as much as digits as its factorization.

671761373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 41.

The square root of 671761373 is about 25918.3597667754. The cubic root of 671761373 is about 875.8001379736.

The spelling of 671761373 in words is "six hundred seventy-one million, seven hundred sixty-one thousand, three hundred seventy-three".