1171212823 has 8 divisors (see below), whose sum is σ = 1290859920. Its totient is φ = 1053761280.

The previous prime is 1171212811. The next prime is 1171212857. The reversal of 1171212823 is 3282121711.

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

It is not a de Polignac number, because 1171212823 - 2²¹ = 1169115671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1171212791 and 1171212800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171212883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547768 + ... + 549901.

It is an arithmetic number, because the mean of its divisors is an integer number (161357490).

Almost surely, 2^1171212823 is an apocalyptic number.

1171212823 is a deficient number, since it is larger than the sum of its proper divisors (119647097).

1171212823 is a wasteful number, since it uses less digits than its factorization.

1171212823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097777.

The product of its digits is 1344, while the sum is 28.

The square root of 1171212823 is about 34222.9867632853. The cubic root of 1171212823 is about 1054.0922158262.

The spelling of 1171212823 in words is "one billion, one hundred seventy-one million, two hundred twelve thousand, eight hundred twenty-three".