1131603407173 has 4 divisors (see below), whose sum is σ = 1132310219148. Its totient is φ = 1130896595200.

The previous prime is 1131603407107. The next prime is 1131603407183. The reversal of 1131603407173 is 3717043061311.

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 850854966724 + 280748440449 = 922418^2 + 529857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131603407173 - 2¹⁷ = 1131603276101 is a prime.

It is a super-2 number, since 2×1131603407173² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131603407183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353403586 + ... + 353406787.

It is an arithmetic number, because the mean of its divisors is an integer number (283077554787).

Almost surely, 2^{1131603407173} is an apocalyptic number.

It is an amenable number.

1131603407173 is a deficient number, since it is larger than the sum of its proper divisors (706811975).

1131603407173 is an equidigital number, since it uses as much as digits as its factorization.

1131603407173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706811974.

The product of its (nonzero) digits is 31752, while the sum is 37.

Adding to 1131603407173 its reverse (3717043061311), we get a palindrome (4848646468484).

The spelling of 1131603407173 in words is "one trillion, one hundred thirty-one billion, six hundred three million, four hundred seven thousand, one hundred seventy-three".