1386471681 has 32 divisors (see below), whose sum is σ = 2349274880. Its totient is φ = 791659008.

The previous prime is 1386471677. The next prime is 1386471689. The reversal of 1386471681 is 1861746831.

It is not a de Polignac number, because 1386471681 - 2² = 1386471677 is a prime.

It is a super-3 number, since 3×1386471681³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386471689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 379395 + ... + 383031.

It is an arithmetic number, because the mean of its divisors is an integer number (73414840).

Almost surely, 2^1386471681 is an apocalyptic number.

It is an amenable number.

1386471681 is a deficient number, since it is larger than the sum of its proper divisors (962803199).

1386471681 is a wasteful number, since it uses less digits than its factorization.

1386471681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670 (or 5664 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1386471681 is about 37235.3552554558. The cubic root of 1386471681 is about 1115.0739441667.

The spelling of 1386471681 in words is "one billion, three hundred eighty-six million, four hundred seventy-one thousand, six hundred eighty-one".