3946987 has 8 divisors (see below), whose sum is σ = 4454640. Its totient is φ = 3464160.

The previous prime is 3946981. The next prime is 3946991. The reversal of 3946987 is 7896493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3946987 is a prime.

It is a Duffinian number.

3946987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3946981) 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, 5868 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (556830).

Almost surely, 2^3946987 is an apocalyptic number.

3946987 is a deficient number, since it is larger than the sum of its proper divisors (507653).

3946987 is a wasteful number, since it uses less digits than its factorization.

3946987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12413.

The product of its digits is 326592, while the sum is 46.

The square root of 3946987 is about 1986.7025444188. The cubic root of 3946987 is about 158.0357100292.

It can be divided in two parts, 394 and 6987, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 3946987 in words is "three million, nine hundred forty-six thousand, nine hundred eighty-seven".