1671091001 has 2 divisors, whose sum is σ = 1671091002. Its totient is φ = 1671091000.

The previous prime is 1671090989. The next prime is 1671091067. The reversal of 1671091001 is 1001901761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1216335376 + 454755625 = 34876^2 + 21325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671091001 - 2⁶ = 1671090937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671093001) 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, 835545500 + 835545501.

It is an arithmetic number, because the mean of its divisors is an integer number (835545501).

Almost surely, 2^1671091001 is an apocalyptic number.

It is an amenable number.

1671091001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671091001 is an equidigital number, since it uses as much as digits as its factorization.

1671091001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 1671091001 is about 40878.9799407960. The cubic root of 1671091001 is about 1186.6793002046.

Adding to 1671091001 its reverse (1001901761), we get a palindrome (2672992762).

The spelling of 1671091001 in words is "one billion, six hundred seventy-one million, ninety-one thousand, one".