1381386693 has 24 divisors (see below), whose sum is σ = 1942702272. Its totient is φ = 872975488.

The previous prime is 1381386673. The next prime is 1381386709. The reversal of 1381386693 is 3966831831.

It is a happy number.

It is not a de Polignac number, because 1381386693 - 2⁵ = 1381386661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381386613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175480 + ... + 183182.

It is an arithmetic number, because the mean of its divisors is an integer number (80945928).

Almost surely, 2^1381386693 is an apocalyptic number.

It is an amenable number.

1381386693 is a deficient number, since it is larger than the sum of its proper divisors (561315579).

1381386693 is a wasteful number, since it uses less digits than its factorization.

1381386693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7865 (or 7842 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 1381386693 is about 37167.0108160449. The cubic root of 1381386693 is about 1113.7090686713.

It can be divided in two parts, 138 and 1386693, that added together give a palindrome (1386831).

The spelling of 1381386693 in words is "one billion, three hundred eighty-one million, three hundred eighty-six thousand, six hundred ninety-three".