1172888889 has 8 divisors (see below), whose sum is σ = 1566117792. Its totient is φ = 780792960.

The previous prime is 1172888879. The next prime is 1172888897. The reversal of 1172888889 is 9888882711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1172888889 - 2²⁵ = 1139334457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1172888819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280824 + ... + 284969.

It is an arithmetic number, because the mean of its divisors is an integer number (195764724).

Almost surely, 2^1172888889 is an apocalyptic number.

It is an amenable number.

1172888889 is a deficient number, since it is larger than the sum of its proper divisors (393228903).

1172888889 is an equidigital number, since it uses as much as digits as its factorization.

1172888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566487.

The product of its digits is 4128768, while the sum is 60.

The square root of 1172888889 is about 34247.4654390657. The cubic root of 1172888889 is about 1054.5947962849.

The spelling of 1172888889 in words is "one billion, one hundred seventy-two million, eight hundred eighty-eight thousand, eight hundred eighty-nine".