1397813 has 8 divisors (see below), whose sum is σ = 1450176. Its totient is φ = 1346400.

The previous prime is 1397783. The next prime is 1397833. The reversal of 1397813 is 3187931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397813 - 2¹⁰ = 1396789 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 1397813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4058 + ... + 4388.

It is an arithmetic number, because the mean of its divisors is an integer number (181272).

2^1397813 is an apocalyptic number.

It is an amenable number.

1397813 is a deficient number, since it is larger than the sum of its proper divisors (52363).

1397813 is a wasteful number, since it uses less digits than its factorization.

1397813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its digits is 4536, while the sum is 32.

The square root of 1397813 is about 1182.2914192364. The cubic root of 1397813 is about 111.8106121179.

The spelling of 1397813 in words is "one million, three hundred ninety-seven thousand, eight hundred thirteen".