1387835429 has 4 divisors (see below), whose sum is σ = 1390846380. Its totient is φ = 1384824480.

The previous prime is 1387835417. The next prime is 1387835431. The reversal of 1387835429 is 9245387831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 522122500 + 865712929 = 22850^2 + 29423^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387835429 - 2²⁸ = 1119399973 is a prime.

It is a super-2 number, since 2×1387835429² = 3852174355975228082, 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 (1387835459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1504784 + ... + 1505705.

It is an arithmetic number, because the mean of its divisors is an integer number (347711595).

Almost surely, 2^1387835429 is an apocalyptic number.

It is an amenable number.

1387835429 is a deficient number, since it is larger than the sum of its proper divisors (3010951).

1387835429 is an equidigital number, since it uses as much as digits as its factorization.

1387835429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010950.

The product of its digits is 1451520, while the sum is 50.

The square root of 1387835429 is about 37253.6632963793. The cubic root of 1387835429 is about 1115.4394238152.

The spelling of 1387835429 in words is "one billion, three hundred eighty-seven million, eight hundred thirty-five thousand, four hundred twenty-nine".