1310997 has 4 divisors (see below), whose sum is σ = 1748000. Its totient is φ = 873996.

The previous prime is 1310993. The next prime is 1310999. The reversal of 1310997 is 7990131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1310997 - 2² = 1310993 is a prime.

It is a D-number.

It is a Duffinian number.

1310997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310993) 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, 218497 + ... + 218502.

It is an arithmetic number, because the mean of its divisors is an integer number (437000).

2^1310997 is an apocalyptic number.

It is an amenable number.

1310997 is a deficient number, since it is larger than the sum of its proper divisors (437003).

1310997 is an equidigital number, since it uses as much as digits as its factorization.

1310997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437002.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1310997 is about 1144.9877728605. The cubic root of 1310997 is about 109.4461694085.

The spelling of 1310997 in words is "one million, three hundred ten thousand, nine hundred ninety-seven".