3887689549 has 4 divisors (see below), whose sum is σ = 3961042236. Its totient is φ = 3814336864.

The previous prime is 3887689501. The next prime is 3887689601. The reversal of 3887689549 is 9459867883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9459867883 = 16451 ⋅575033.

It can be written as a sum of positive squares in 2 ways, for example, as 2472575625 + 1415113924 = 49725^2 + 37618^2 .

It is a cyclic number.

It is not a de Polignac number, because 3887689549 - 2¹¹ = 3887687501 is a prime.

It is a super-2 number, since 2×3887689549² = 30228260058807646802, 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 (3887689649) 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, 36676264 + ... + 36676369.

It is an arithmetic number, because the mean of its divisors is an integer number (990260559).

Almost surely, 2^3887689549 is an apocalyptic number.

It is an amenable number.

3887689549 is a deficient number, since it is larger than the sum of its proper divisors (73352687).

3887689549 is an equidigital number, since it uses as much as digits as its factorization.

3887689549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73352686.

The product of its digits is 104509440, while the sum is 67.

The square root of 3887689549 is about 62351.3395926663. The cubic root of 3887689549 is about 1572.4029829532.

The spelling of 3887689549 in words is "three billion, eight hundred eighty-seven million, six hundred eighty-nine thousand, five hundred forty-nine".