1163172273 has 4 divisors (see below), whose sum is σ = 1550896368. Its totient is φ = 775448180.

The previous prime is 1163172259. The next prime is 1163172277. The reversal of 1163172273 is 3722713611.

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: 3722713611 = 3 ⋅1240904537.

It is a cyclic number.

It is not a de Polignac number, because 1163172273 - 2¹² = 1163168177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1163172277) 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, 193862043 + ... + 193862048.

It is an arithmetic number, because the mean of its divisors is an integer number (387724092).

Almost surely, 2^1163172273 is an apocalyptic number.

It is an amenable number.

1163172273 is a deficient number, since it is larger than the sum of its proper divisors (387724095).

1163172273 is an equidigital number, since it uses as much as digits as its factorization.

1163172273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387724094.

The product of its digits is 10584, while the sum is 33.

The square root of 1163172273 is about 34105.3115071538. The cubic root of 1163172273 is about 1051.6745081709.

Adding to 1163172273 its reverse (3722713611), we get a palindrome (4885885884).

The spelling of 1163172273 in words is "one billion, one hundred sixty-three million, one hundred seventy-two thousand, two hundred seventy-three".