1172913702173 has 4 divisors (see below), whose sum is σ = 1204614072540. Its totient is φ = 1141213331808.

The previous prime is 1172913702151. The next prime is 1172913702179. The reversal of 1172913702173 is 3712073192711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 529136946724 + 643776755449 = 727418^2 + 802357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172913702173 - 2⁸ = 1172913701917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172913702179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15850185128 + ... + 15850185201.

It is an arithmetic number, because the mean of its divisors is an integer number (301153518135).

Almost surely, 2^{1172913702173} is an apocalyptic number.

It is an amenable number.

1172913702173 is a deficient number, since it is larger than the sum of its proper divisors (31700370367).

1172913702173 is an equidigital number, since it uses as much as digits as its factorization.

1172913702173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31700370366.

The product of its (nonzero) digits is 111132, while the sum is 44.

Adding to 1172913702173 its reverse (3712073192711), we get a palindrome (4884986894884).

The spelling of 1172913702173 in words is "one trillion, one hundred seventy-two billion, nine hundred thirteen million, seven hundred two thousand, one hundred seventy-three".