1386355381 has 4 divisors (see below), whose sum is σ = 1415852352. Its totient is φ = 1356858412.

The previous prime is 1386355351. The next prime is 1386355393. The reversal of 1386355381 is 1835536831.

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 1386355381 - 2¹³ = 1386347189 is a prime.

It is a super-2 number, since 2×1386355381² = 3843962484855310322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386355351) 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, 14748415 + ... + 14748508.

It is an arithmetic number, because the mean of its divisors is an integer number (353963088).

Almost surely, 2^1386355381 is an apocalyptic number.

It is an amenable number.

1386355381 is a deficient number, since it is larger than the sum of its proper divisors (29496971).

1386355381 is an equidigital number, since it uses as much as digits as its factorization.

1386355381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29496970.

The product of its digits is 259200, while the sum is 43.

The square root of 1386355381 is about 37233.7935349059. The cubic root of 1386355381 is about 1115.0427650888.

The spelling of 1386355381 in words is "one billion, three hundred eighty-six million, three hundred fifty-five thousand, three hundred eighty-one".