3956989 has 8 divisors (see below), whose sum is σ = 4226112. Its totient is φ = 3696000.

The previous prime is 3956983. The next prime is 3956999. The reversal of 3956989 is 9896593.

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

It is a cyclic number.

It is not a de Polignac number, because 3956989 - 2⁵ = 3956957 is a prime.

It is a super-2 number, since 2×3956989² = 31315523892242, which contains 22 as substring.

3956989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3956983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012 + ... + 2989.

It is an arithmetic number, because the mean of its divisors is an integer number (528264).

Almost surely, 2^3956989 is an apocalyptic number.

It is an amenable number.

3956989 is a deficient number, since it is larger than the sum of its proper divisors (269123).

3956989 is a wasteful number, since it uses less digits than its factorization.

3956989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067.

The product of its digits is 524880, while the sum is 49.

The square root of 3956989 is about 1989.2181881332. The cubic root of 3956989 is about 158.1690893944.

It can be divided in two parts, 3956 and 989, that multiplied together give a square (3912484 = 1978²).

The spelling of 3956989 in words is "three million, nine hundred fifty-six thousand, nine hundred eighty-nine".