1317623 has 4 divisors (see below), whose sum is σ = 1320048. Its totient is φ = 1315200.

The previous prime is 1317599. The next prime is 1317629. The reversal of 1317623 is 3267131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3267131 = 7 ⋅466733.

It is a cyclic number.

It is not a de Polignac number, because 1317623 - 2¹⁴ = 1301239 is a prime.

It is a super-2 number, since 2×1317623² = 3472260740258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317629) 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, 23 + ... + 1623.

It is an arithmetic number, because the mean of its divisors is an integer number (330012).

2^1317623 is an apocalyptic number.

1317623 is a deficient number, since it is larger than the sum of its proper divisors (2425).

1317623 is an equidigital number, since it uses as much as digits as its factorization.

1317623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its digits is 756, while the sum is 23.

The square root of 1317623 is about 1147.8776067160. The cubic root of 1317623 is about 109.6302461055.

The spelling of 1317623 in words is "one million, three hundred seventeen thousand, six hundred twenty-three".