1317021667 has 8 divisors (see below), whose sum is σ = 1430884224. Its totient is φ = 1204952448.

The previous prime is 1317021647. The next prime is 1317021683. The reversal of 1317021667 is 7661207131.

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

It is not a de Polignac number, because 1317021667 - 2¹¹ = 1317019619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317021647) 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, 446803 + ... + 449740.

It is an arithmetic number, because the mean of its divisors is an integer number (178860528).

Almost surely, 2^1317021667 is an apocalyptic number.

1317021667 is a deficient number, since it is larger than the sum of its proper divisors (113862557).

1317021667 is a wasteful number, since it uses less digits than its factorization.

1317021667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896669.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1317021667 is about 36290.7931437162. The cubic root of 1317021667 is about 1096.1356598887.

Adding to 1317021667 its reverse (7661207131), we get a palindrome (8978228798).

The spelling of 1317021667 in words is "one billion, three hundred seventeen million, twenty-one thousand, six hundred sixty-seven".