3955869 has 6 divisors (see below), whose sum is σ = 5714046. Its totient is φ = 2637240.

The previous prime is 3955859. The next prime is 3955877. The reversal of 3955869 is 9685593.

3955869 is a `hidden beast` number, since 39 + 558 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2442969 + 1512900 = 1563^2 + 1230^2 .

It is not a de Polignac number, because 3955869 - 2¹⁶ = 3890333 is a prime.

It is a super-2 number, since 2×3955869² = 31297799090322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3955859) 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 5 ways as a sum of consecutive naturals, for example, 219762 + ... + 219779.

It is an arithmetic number, because the mean of its divisors is an integer number (952341).

Almost surely, 2^3955869 is an apocalyptic number.

It is an amenable number.

3955869 is a deficient number, since it is larger than the sum of its proper divisors (1758177).

3955869 is a wasteful number, since it uses less digits than its factorization.

3955869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439547 (or 439544 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 3955869 is about 1988.9366505749. The cubic root of 3955869 is about 158.1541650756.

The spelling of 3955869 in words is "three million, nine hundred fifty-five thousand, eight hundred sixty-nine".