1317003381 has 14 divisors (see below), whose sum is σ = 1974602870. Its totient is φ = 878001768.

The previous prime is 1317003343. The next prime is 1317003383. The reversal of 1317003381 is 1833007131.

It can be written as a sum of positive squares in only one way, i.e., 1312902756 + 4100625 = 36234^2 + 2025^2 .

It is not a de Polignac number, because 1317003381 - 2¹³ = 1316995189 is a prime.

It is a super-2 number, since 2×1317003381² = 3468995811130862322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317003383) 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 13 ways as a sum of consecutive naturals, for example, 902566 + ... + 904023.

Almost surely, 2^1317003381 is an apocalyptic number.

It is an amenable number.

1317003381 is a deficient number, since it is larger than the sum of its proper divisors (657599489).

1317003381 is an frugal number, since it uses more digits than its factorization.

1317003381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806607 (or 1806592 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1317003381 is about 36290.5412056640. The cubic root of 1317003381 is about 1096.1305868186.

The spelling of 1317003381 in words is "one billion, three hundred seventeen million, three thousand, three hundred eighty-one".