1397911 has 4 divisors (see below), whose sum is σ = 1404000. Its totient is φ = 1391824.

The previous prime is 1397909. The next prime is 1397933. The reversal of 1397911 is 1197931.

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

It is a cyclic number.

It is not a de Polignac number, because 1397911 - 2¹ = 1397909 is a prime.

It is a Duffinian number.

1397911 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686 + ... + 3163.

It is an arithmetic number, because the mean of its divisors is an integer number (351000).

2^1397911 is an apocalyptic number.

1397911 is a deficient number, since it is larger than the sum of its proper divisors (6089).

1397911 is an equidigital number, since it uses as much as digits as its factorization.

1397911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088.

The product of its digits is 1701, while the sum is 31.

The square root of 1397911 is about 1182.3328634526. The cubic root of 1397911 is about 111.8132250530.

The spelling of 1397911 in words is "one million, three hundred ninety-seven thousand, nine hundred eleven".