1378693 has 4 divisors (see below), whose sum is σ = 1381068. Its totient is φ = 1376320.

The previous prime is 1378691. The next prime is 1378703. The reversal of 1378693 is 3968731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 1304164 = 273^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378693 - 2¹ = 1378691 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 (1378691) 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, 333 + ... + 1693.

It is an arithmetic number, because the mean of its divisors is an integer number (345267).

2^1378693 is an apocalyptic number.

It is an amenable number.

1378693 is a deficient number, since it is larger than the sum of its proper divisors (2375).

1378693 is a wasteful number, since it uses less digits than its factorization.

1378693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374.

The product of its digits is 27216, while the sum is 37.

The square root of 1378693 is about 1174.1775845246. The cubic root of 1378693 is about 111.2984689698.

The spelling of 1378693 in words is "one million, three hundred seventy-eight thousand, six hundred ninety-three".