1172009231 has 8 divisors (see below), whose sum is σ = 1201132800. Its totient is φ = 1142911360.

The previous prime is 1172009221. The next prime is 1172009261. The reversal of 1172009231 is 1329002711.

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

It is a cyclic number.

It is not a de Polignac number, because 1172009231 - 2¹⁰ = 1172008207 is a prime.

It is a super-2 number, since 2×1172009231² = 2747211275098422722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1172009231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172009221) 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, 113075 + ... + 123003.

It is an arithmetic number, because the mean of its divisors is an integer number (150141600).

Almost surely, 2^1172009231 is an apocalyptic number.

1172009231 is a deficient number, since it is larger than the sum of its proper divisors (29123569).

1172009231 is an equidigital number, since it uses as much as digits as its factorization.

1172009231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12849.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1172009231 is about 34234.6203571764. The cubic root of 1172009231 is about 1054.3310842450.

The spelling of 1172009231 in words is "one billion, one hundred seventy-two million, nine thousand, two hundred thirty-one".