1297983 has 4 divisors (see below), whose sum is σ = 1730648. Its totient is φ = 865320.

The previous prime is 1297979. The next prime is 1297993. The reversal of 1297983 is 3897921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1297983 - 2² = 1297979 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297963) 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, 216328 + ... + 216333.

It is an arithmetic number, because the mean of its divisors is an integer number (432662).

2^1297983 is an apocalyptic number.

1297983 is a deficient number, since it is larger than the sum of its proper divisors (432665).

1297983 is an equidigital number, since it uses as much as digits as its factorization.

1297983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432664.

The product of its digits is 27216, while the sum is 39.

The square root of 1297983 is about 1139.2905687313. The cubic root of 1297983 is about 109.0828144878.

The spelling of 1297983 in words is "one million, two hundred ninety-seven thousand, nine hundred eighty-three".