3953986 has 4 divisors (see below), whose sum is σ = 5930982. Its totient is φ = 1976992.

The previous prime is 3953927. The next prime is 3953993. The reversal of 3953986 is 6893593.

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

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 53361 = 1975^2 + 231^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988495 + ... + 988498.

Almost surely, 2^3953986 is an apocalyptic number.

3953986 is a deficient number, since it is larger than the sum of its proper divisors (1976996).

3953986 is a wasteful number, since it uses less digits than its factorization.

3953986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976995.

The product of its digits is 174960, while the sum is 43.

The square root of 3953986 is about 1988.4632257097. The cubic root of 3953986 is about 158.1290672140.

The spelling of 3953986 in words is "three million, nine hundred fifty-three thousand, nine hundred eighty-six".