1397623 has 4 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 1389088.

The previous prime is 1397609. The next prime is 1397633. The reversal of 1397623 is 3267931.

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 1397623 - 2¹³ = 1389431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4018 + ... + 4351.

It is an arithmetic number, because the mean of its divisors is an integer number (351540).

2^1397623 is an apocalyptic number.

1397623 is a deficient number, since it is larger than the sum of its proper divisors (8537).

1397623 is an equidigital number, since it uses as much as digits as its factorization.

1397623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8536.

The product of its digits is 6804, while the sum is 31.

The square root of 1397623 is about 1182.2110640660. The cubic root of 1397623 is about 111.8055458754.

The spelling of 1397623 in words is "one million, three hundred ninety-seven thousand, six hundred twenty-three".