3909887 has 4 divisors (see below), whose sum is σ = 3946536. Its totient is φ = 3873240.

The previous prime is 3909853. The next prime is 3909889. The reversal of 3909887 is 7889093.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3909887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909889) 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, 18164 + ... + 18377.

It is an arithmetic number, because the mean of its divisors is an integer number (986634).

Almost surely, 2^3909887 is an apocalyptic number.

3909887 is a deficient number, since it is larger than the sum of its proper divisors (36649).

3909887 is a wasteful number, since it uses less digits than its factorization.

3909887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36648.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3909887 is about 1977.3434198439. The cubic root of 3909887 is about 157.5389942921.

The spelling of 3909887 in words is "three million, nine hundred nine thousand, eight hundred eighty-seven".