1671974449 has 2 divisors, whose sum is σ = 1671974450. Its totient is φ = 1671974448.

The previous prime is 1671974401. The next prime is 1671974459. The reversal of 1671974449 is 9444791761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929030400 + 742944049 = 30480^2 + 27257^2 .

It is an emirp because it is prime and its reverse (9444791761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1671974449 - 2²⁷ = 1537756721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1671974396 and 1671974405.

It is not a weakly prime, because it can be changed into another prime (1671974459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835987224 + 835987225.

It is an arithmetic number, because the mean of its divisors is an integer number (835987225).

Almost surely, 2^1671974449 is an apocalyptic number.

It is an amenable number.

1671974449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671974449 is an equidigital number, since it uses as much as digits as its factorization.

1671974449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The square root of 1671974449 is about 40889.7841642628. The cubic root of 1671974449 is about 1186.8883821282. Note that the first 3 decimals are identical.

The spelling of 1671974449 in words is "one billion, six hundred seventy-one million, nine hundred seventy-four thousand, four hundred forty-nine".