1023320173 has 2 divisors, whose sum is σ = 1023320174. Its totient is φ = 1023320172.

The previous prime is 1023320159. The next prime is 1023320213. The reversal of 1023320173 is 3710233201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903483364 + 119836809 = 30058^2 + 10947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023320173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023323173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511660086 + 511660087.

It is an arithmetic number, because the mean of its divisors is an integer number (511660087).

Almost surely, 2^1023320173 is an apocalyptic number.

It is an amenable number.

1023320173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023320173 is an equidigital number, since it uses as much as digits as its factorization.

1023320173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 1023320173 is about 31989.3759395209. The cubic root of 1023320173 is about 1007.7137362791.

Adding to 1023320173 its reverse (3710233201), we get a palindrome (4733553374).

The spelling of 1023320173 in words is "one billion, twenty-three million, three hundred twenty thousand, one hundred seventy-three".