1317143782 has 8 divisors (see below), whose sum is σ = 2091934296. Its totient is φ = 619832352.

The previous prime is 1317143777. The next prime is 1317143801. The reversal of 1317143782 is 2873417131.

It is a happy number.

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

It is a super-2 number, since 2×1317143782² = 3469735484922527048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19369728 + ... + 19369795.

It is an arithmetic number, because the mean of its divisors is an integer number (261491787).

Almost surely, 2^1317143782 is an apocalyptic number.

1317143782 is a deficient number, since it is larger than the sum of its proper divisors (774790514).

1317143782 is a wasteful number, since it uses less digits than its factorization.

1317143782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38739542.

The product of its digits is 28224, while the sum is 37.

The square root of 1317143782 is about 36292.4755562362. The cubic root of 1317143782 is about 1096.1695369495.

It can be divided in two parts, 13171 and 43782, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 1317143782 in words is "one billion, three hundred seventeen million, one hundred forty-three thousand, seven hundred eighty-two".