1387632969 has 12 divisors (see below), whose sum is σ = 2018780400. Its totient is φ = 918432504.

The previous prime is 1387632949. The next prime is 1387632979. The reversal of 1387632969 is 9692367831.

It is not a de Polignac number, because 1387632969 - 2⁵ = 1387632937 is a prime.

It is a super-3 number, since 3×1387632969³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1387632929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553359 + ... + 555860.

It is an arithmetic number, because the mean of its divisors is an integer number (168231700).

Almost surely, 2^1387632969 is an apocalyptic number.

It is an amenable number.

1387632969 is a deficient number, since it is larger than the sum of its proper divisors (631147431).

1387632969 is a wasteful number, since it uses less digits than its factorization.

1387632969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109364 (or 1109361 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1387632969 is about 37250.9458806082. The cubic root of 1387632969 is about 1115.3851803885.

The spelling of 1387632969 in words is "one billion, three hundred eighty-seven million, six hundred thirty-two thousand, nine hundred sixty-nine".