1397813693 has 4 divisors (see below), whose sum is σ = 1402753248. Its totient is φ = 1392874140.

The previous prime is 1397813647. The next prime is 1397813701. The reversal of 1397813693 is 3963187931.

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 a cyclic number.

It is not a de Polignac number, because 1397813693 - 2²⁶ = 1330704829 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 (1397813633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469353 + ... + 2469918.

It is an arithmetic number, because the mean of its divisors is an integer number (350688312).

Almost surely, 2^1397813693 is an apocalyptic number.

It is an amenable number.

1397813693 is a deficient number, since it is larger than the sum of its proper divisors (4939555).

1397813693 is an equidigital number, since it uses as much as digits as its factorization.

1397813693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4939554.

The product of its digits is 734832, while the sum is 50.

The square root of 1397813693 is about 37387.3466964426. The cubic root of 1397813693 is about 1118.1063059555.

The spelling of 1397813693 in words is "one billion, three hundred ninety-seven million, eight hundred thirteen thousand, six hundred ninety-three".