1317979 has 4 divisors (see below), whose sum is σ = 1419376. Its totient is φ = 1216584.

The previous prime is 1317971. The next prime is 1317989. The reversal of 1317979 is 9797131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9797131 = 1087 ⋅9013.

It is a cyclic number.

It is not a de Polignac number, because 1317979 - 2³ = 1317971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50679 + ... + 50704.

It is an arithmetic number, because the mean of its divisors is an integer number (354844).

2^1317979 is an apocalyptic number.

1317979 is a deficient number, since it is larger than the sum of its proper divisors (101397).

1317979 is a wasteful number, since it uses less digits than its factorization.

1317979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101396.

The product of its digits is 11907, while the sum is 37.

The square root of 1317979 is about 1148.0326650405. The cubic root of 1317979 is about 109.6401186445.

The spelling of 1317979 in words is "one million, three hundred seventeen thousand, nine hundred seventy-nine".