1291117323 has 8 divisors (see below), whose sum is σ = 1780851600. Its totient is φ = 831063968.

The previous prime is 1291117313. The next prime is 1291117337. The reversal of 1291117323 is 3237111921.

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 1291117323 - 2⁵ = 1291117291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1291117313) 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, 7420128 + ... + 7420301.

It is an arithmetic number, because the mean of its divisors is an integer number (222606450).

Almost surely, 2^1291117323 is an apocalyptic number.

1291117323 is a deficient number, since it is larger than the sum of its proper divisors (489734277).

1291117323 is a wasteful number, since it uses less digits than its factorization.

1291117323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14840461.

The product of its digits is 2268, while the sum is 30.

The square root of 1291117323 is about 35932.1210478869. The cubic root of 1291117323 is about 1088.9014330805.

The spelling of 1291117323 in words is "one billion, two hundred ninety-one million, one hundred seventeen thousand, three hundred twenty-three".