1326653173 has 4 divisors (see below), whose sum is σ = 1349138880. Its totient is φ = 1304167468.

The previous prime is 1326653147. The next prime is 1326653197. The reversal of 1326653173 is 3713566231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3713566231 = 4297 ⋅864223.

It is a cyclic number.

It is not a de Polignac number, because 1326653173 - 2²⁹ = 789782261 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 (1326053173) 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, 11242765 + ... + 11242882.

It is an arithmetic number, because the mean of its divisors is an integer number (337284720).

Almost surely, 2^1326653173 is an apocalyptic number.

It is an amenable number.

1326653173 is a deficient number, since it is larger than the sum of its proper divisors (22485707).

1326653173 is an equidigital number, since it uses as much as digits as its factorization.

1326653173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22485706.

The product of its digits is 68040, while the sum is 37.

The square root of 1326653173 is about 36423.2504452856. The cubic root of 1326653173 is about 1098.8012210437.

The spelling of 1326653173 in words is "one billion, three hundred twenty-six million, six hundred fifty-three thousand, one hundred seventy-three".