1671606473 has 2 divisors, whose sum is σ = 1671606474. Its totient is φ = 1671606472.

The previous prime is 1671606361. The next prime is 1671606479. The reversal of 1671606473 is 3746061761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202147584 + 469458889 = 34672^2 + 21667^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671606473 - 2¹² = 1671602377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1671606473.

It is not a weakly prime, because it can be changed into another prime (1671606479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835803236 + 835803237.

It is an arithmetic number, because the mean of its divisors is an integer number (835803237).

Almost surely, 2^1671606473 is an apocalyptic number.

It is an amenable number.

1671606473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671606473 is an equidigital number, since it uses as much as digits as its factorization.

1671606473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 1671606473 is about 40885.2843086605. The cubic root of 1671606473 is about 1186.8013037474.

The spelling of 1671606473 in words is "one billion, six hundred seventy-one million, six hundred six thousand, four hundred seventy-three".