3987699 has 4 divisors (see below), whose sum is σ = 5316936. Its totient is φ = 2658464.

The previous prime is 3987677. The next prime is 3987727. The reversal of 3987699 is 9967893.

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

It is a cyclic number.

It is not a de Polignac number, because 3987699 - 2²¹ = 1890547 is a prime.

It is a D-number.

3987699 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3987629) 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, 664614 + ... + 664619.

It is an arithmetic number, because the mean of its divisors is an integer number (1329234).

Almost surely, 2^3987699 is an apocalyptic number.

3987699 is a deficient number, since it is larger than the sum of its proper divisors (1329237).

3987699 is a wasteful number, since it uses less digits than its factorization.

3987699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329236.

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

The square root of 3987699 is about 1996.9223820670. The cubic root of 3987699 is about 158.5772162716.

The spelling of 3987699 in words is "three million, nine hundred eighty-seven thousand, six hundred ninety-nine".