3987969 has 8 divisors (see below), whose sum is σ = 5337600. Its totient is φ = 2648496.

The previous prime is 3987943. The next prime is 3988003. The reversal of 3987969 is 9697893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3987969 - 2⁵ = 3987937 is a prime.

It is a super-2 number, since 2×3987969² = 31807793489922, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1569 + ... + 3230.

It is an arithmetic number, because the mean of its divisors is an integer number (667200).

Almost surely, 2^3987969 is an apocalyptic number.

It is an amenable number.

3987969 is a deficient number, since it is larger than the sum of its proper divisors (1349631).

3987969 is a wasteful number, since it uses less digits than its factorization.

3987969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079.

The product of its digits is 734832, while the sum is 51.

The square root of 3987969 is about 1996.9899849524. The cubic root of 3987969 is about 158.5807951845.

The spelling of 3987969 in words is "three million, nine hundred eighty-seven thousand, nine hundred sixty-nine".