1319897 has 4 divisors (see below), whose sum is σ = 1397556. Its totient is φ = 1242240.

The previous prime is 1319893. The next prime is 1319909. The reversal of 1319897 is 7989131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7989131 = 59 ⋅135409.

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 817216 = 709^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1319897 - 2² = 1319893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1319897.

It is not an unprimeable number, because it can be changed into a prime (1319893) 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, 38804 + ... + 38837.

It is an arithmetic number, because the mean of its divisors is an integer number (349389).

2^1319897 is an apocalyptic number.

1319897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1319897 is a deficient number, since it is larger than the sum of its proper divisors (77659).

1319897 is an equidigital number, since it uses as much as digits as its factorization.

1319897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77658.

The product of its digits is 13608, while the sum is 38.

The square root of 1319897 is about 1148.8677034367. The cubic root of 1319897 is about 109.6932777670.

The spelling of 1319897 in words is "one million, three hundred nineteen thousand, eight hundred ninety-seven".