1673171281 has 2 divisors, whose sum is σ = 1673171282. Its totient is φ = 1673171280.

The previous prime is 1673171261. The next prime is 1673171287. The reversal of 1673171281 is 1821713761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1603281681 + 69889600 = 40041^2 + 8360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673171281 - 2⁵ = 1673171249 is a prime.

It is a super-2 number, since 2×1673171281² = 5599004271126361922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1673171281.

It is not a weakly prime, because it can be changed into another prime (1673171287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836585640 + 836585641.

It is an arithmetic number, because the mean of its divisors is an integer number (836585641).

Almost surely, 2^1673171281 is an apocalyptic number.

It is an amenable number.

1673171281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673171281 is an equidigital number, since it uses as much as digits as its factorization.

1673171281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 37.

The square root of 1673171281 is about 40904.4163996994. The cubic root of 1673171281 is about 1187.1715138850.

The spelling of 1673171281 in words is "one billion, six hundred seventy-three million, one hundred seventy-one thousand, two hundred eighty-one".