1671543617 has 2 divisors, whose sum is σ = 1671543618. Its totient is φ = 1671543616.

The previous prime is 1671543589. The next prime is 1671543641. The reversal of 1671543617 is 7163451761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416694321 + 254849296 = 37639^2 + 15964^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671543617 - 2¹² = 1671539521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671543217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835771808 + 835771809.

It is an arithmetic number, because the mean of its divisors is an integer number (835771809).

Almost surely, 2^1671543617 is an apocalyptic number.

It is an amenable number.

1671543617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671543617 is an equidigital number, since it uses as much as digits as its factorization.

1671543617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 1671543617 is about 40884.5156141051. The cubic root of 1671543617 is about 1186.7864281334.

The spelling of 1671543617 in words is "one billion, six hundred seventy-one million, five hundred forty-three thousand, six hundred seventeen".