1317943451 has 8 divisors (see below), whose sum is σ = 1438551408. Its totient is φ = 1197468000.

The previous prime is 1317943427. The next prime is 1317943453. The reversal of 1317943451 is 1543497131.

It is a happy number.

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 1317943451 - 2¹⁸ = 1317681307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317943453) 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, 11720 + ... + 52661.

It is an arithmetic number, because the mean of its divisors is an integer number (179818926).

Almost surely, 2^1317943451 is an apocalyptic number.

1317943451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1317943451 is a deficient number, since it is larger than the sum of its proper divisors (120607957).

1317943451 is a wasteful number, since it uses less digits than its factorization.

1317943451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66253.

The product of its digits is 45360, while the sum is 38.

The square root of 1317943451 is about 36303.4908927502. The cubic root of 1317943451 is about 1096.3913288483.

The spelling of 1317943451 in words is "one billion, three hundred seventeen million, nine hundred forty-three thousand, four hundred fifty-one".