1386892081 has 9 divisors (see below), whose sum is σ = 1401531321. Its totient is φ = 1372405332.

The previous prime is 1386892051. The next prime is 1386892097. The reversal of 1386892081 is 1802986831.

The square root of 1386892081 is 37241.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1386892081 - 2⁵ = 1386892049 is a prime.

It is a super-3 number, since 3×1386892081³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386892051) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6219136 + ... + 6219358.

Almost surely, 2^1386892081 is an apocalyptic number.

1386892081 is the 37241-st square number.

1386892081 is the 18621-st centered octagonal number.

It is an amenable number.

1386892081 is a deficient number, since it is larger than the sum of its proper divisors (14639240).

1386892081 is an frugal number, since it uses more digits than its factorization.

1386892081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The cubic root of 1386892081 is about 1115.1866354248.

The spelling of 1386892081 in words is "one billion, three hundred eighty-six million, eight hundred ninety-two thousand, eighty-one".