3887661111 has 4 divisors (see below), whose sum is σ = 5183548152. Its totient is φ = 2591774072.

The previous prime is 3887661109. The next prime is 3887661119. The reversal of 3887661111 is 1111667883.

It is a happy number.

3887661111 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111667883 = 3 ⋅370555961.

It is a cyclic number.

It is not a de Polignac number, because 3887661111 - 2¹ = 3887661109 is a prime.

It is a super-2 number, since 2×3887661111² = 30227817827963508642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3887661119) 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, 647943516 + ... + 647943521.

It is an arithmetic number, because the mean of its divisors is an integer number (1295887038).

Almost surely, 2^3887661111 is an apocalyptic number.

3887661111 is a deficient number, since it is larger than the sum of its proper divisors (1295887041).

3887661111 is a wasteful number, since it uses less digits than its factorization.

3887661111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295887040.

The product of its digits is 48384, while the sum is 42.

The square root of 3887661111 is about 62351.1115458257. Note that the first 3 decimals coincide. The cubic root of 3887661111 is about 1572.3991489618.

The spelling of 3887661111 in words is "three billion, eight hundred eighty-seven million, six hundred sixty-one thousand, one hundred eleven".