3987369 has 6 divisors (see below), whose sum is σ = 5759546. Its totient is φ = 2658240.

The previous prime is 3987353. The next prime is 3987407. The reversal of 3987369 is 9637893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2576025 + 1411344 = 1605^2 + 1188^2 .

It is not a de Polignac number, because 3987369 - 2⁴ = 3987353 is a prime.

It is a super-2 number, since 2×3987369² = 31798223084322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221512 + ... + 221529.

Almost surely, 2^3987369 is an apocalyptic number.

It is an amenable number.

3987369 is a deficient number, since it is larger than the sum of its proper divisors (1772177).

3987369 is a wasteful number, since it uses less digits than its factorization.

3987369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443047 (or 443044 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3987369 is about 1996.8397532101. The cubic root of 3987369 is about 158.5728418254.

It can be divided in two parts, 3987 and 369, that added together give a square (4356 = 66²).

The spelling of 3987369 in words is "three million, nine hundred eighty-seven thousand, three hundred sixty-nine".