1673171261 has 2 divisors, whose sum is σ = 1673171262. Its totient is φ = 1673171260.

The previous prime is 1673171251. The next prime is 1673171281. The reversal of 1673171261 is 1621713761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1319505625 + 353665636 = 36325^2 + 18806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673171261 - 2⁶ = 1673171197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1673171231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836585630 + 836585631.

It is an arithmetic number, because the mean of its divisors is an integer number (836585631).

Almost surely, 2^1673171261 is an apocalyptic number.

It is an amenable number.

1673171261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673171261 is an equidigital number, since it uses as much as digits as its factorization.

1673171261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 1673171261 is about 40904.4161552271. The cubic root of 1673171261 is about 1187.1715091547.

The spelling of 1673171261 in words is "one billion, six hundred seventy-three million, one hundred seventy-one thousand, two hundred sixty-one".