1338445973 has 2 divisors, whose sum is σ = 1338445974. Its totient is φ = 1338445972.

The previous prime is 1338445897. The next prime is 1338445981. The reversal of 1338445973 is 3795448331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935319889 + 403126084 = 30583^2 + 20078^2 .

It is an emirp because it is prime and its reverse (3795448331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338445973 - 2¹² = 1338441877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338445573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669222986 + 669222987.

It is an arithmetic number, because the mean of its divisors is an integer number (669222987).

Almost surely, 2^1338445973 is an apocalyptic number.

It is an amenable number.

1338445973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338445973 is an equidigital number, since it uses as much as digits as its factorization.

1338445973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The square root of 1338445973 is about 36584.7778864380. Note that the first 3 decimals coincide. The cubic root of 1338445973 is about 1102.0474190264.

The spelling of 1338445973 in words is "one billion, three hundred thirty-eight million, four hundred forty-five thousand, nine hundred seventy-three".