1003121173 has 2 divisors, whose sum is σ = 1003121174. Its totient is φ = 1003121172.

The previous prime is 1003121117. The next prime is 1003121177. The reversal of 1003121173 is 3711213001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518108644 + 485012529 = 22762^2 + 22023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003121173 - 2²¹ = 1001024021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1003121173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003121177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501560586 + 501560587.

It is an arithmetic number, because the mean of its divisors is an integer number (501560587).

Almost surely, 2^1003121173 is an apocalyptic number.

It is an amenable number.

1003121173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003121173 is an equidigital number, since it uses as much as digits as its factorization.

1003121173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 1003121173 is about 31672.0882323853. The cubic root of 1003121173 is about 1001.0393104596.

Adding to 1003121173 its reverse (3711213001), we get a palindrome (4714334174).

The spelling of 1003121173 in words is "one billion, three million, one hundred twenty-one thousand, one hundred seventy-three".