1172663871 has 8 divisors (see below), whose sum is σ = 1564502064. Its totient is φ = 781300800.

The previous prime is 1172663857. The next prime is 1172663951. The reversal of 1172663871 is 1783662711.

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

It is not a de Polignac number, because 1172663871 - 2⁵ = 1172663839 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172663851) 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 7 ways as a sum of consecutive naturals, for example, 112980 + ... + 122921.

It is an arithmetic number, because the mean of its divisors is an integer number (195562758).

Almost surely, 2^1172663871 is an apocalyptic number.

1172663871 is a deficient number, since it is larger than the sum of its proper divisors (391838193).

1172663871 is a wasteful number, since it uses less digits than its factorization.

1172663871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237561.

The product of its digits is 84672, while the sum is 42.

The square root of 1172663871 is about 34244.1801040702. The cubic root of 1172663871 is about 1054.5273508542.

The spelling of 1172663871 in words is "one billion, one hundred seventy-two million, six hundred sixty-three thousand, eight hundred seventy-one".