1673271913 has 2 divisors, whose sum is σ = 1673271914. Its totient is φ = 1673271912.

The previous prime is 1673271911. The next prime is 1673271947. The reversal of 1673271913 is 3191723761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1286441689 + 386830224 = 35867^2 + 19668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1673271913 - 2¹ = 1673271911 is a prime.

Together with 1673271911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1673271911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836635956 + 836635957.

It is an arithmetic number, because the mean of its divisors is an integer number (836635957).

Almost surely, 2^1673271913 is an apocalyptic number.

It is an amenable number.

1673271913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1673271913 is an equidigital number, since it uses as much as digits as its factorization.

1673271913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 1673271913 is about 40905.6464684278. The cubic root of 1673271913 is about 1187.1953140083.

The spelling of 1673271913 in words is "one billion, six hundred seventy-three million, two hundred seventy-one thousand, nine hundred thirteen".