1318919 has 4 divisors (see below), whose sum is σ = 1507344. Its totient is φ = 1130496.

The previous prime is 1318913. The next prime is 1318927. The reversal of 1318919 is 9198131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9198131 = 313 ⋅29387.

It is a cyclic number.

It is not a de Polignac number, because 1318919 - 2⁴ = 1318903 is a prime.

It is a super-2 number, since 2×1318919² = 3479094657122, 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 (1318913) 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, 94202 + ... + 94215.

It is an arithmetic number, because the mean of its divisors is an integer number (376836).

2^1318919 is an apocalyptic number.

1318919 is a deficient number, since it is larger than the sum of its proper divisors (188425).

1318919 is an equidigital number, since it uses as much as digits as its factorization.

1318919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188424.

The product of its digits is 1944, while the sum is 32.

The square root of 1318919 is about 1148.4419880865. The cubic root of 1318919 is about 109.6661780429. Note that the first 3 decimals are identical.

The spelling of 1318919 in words is "one million, three hundred eighteen thousand, nine hundred nineteen".