3973869 has 24 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 2360448.

The previous prime is 3973861. The next prime is 3973877. The reversal of 3973869 is 9683793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3973861) and next prime (3973877).

It is not a de Polignac number, because 3973869 - 2³ = 3973861 is a prime.

It is a super-2 number, since 2×3973869² = 31583269658322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973861) 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 23 ways as a sum of consecutive naturals, for example, 2224 + ... + 3590.

It is an arithmetic number, because the mean of its divisors is an integer number (266760).

Almost surely, 2^3973869 is an apocalyptic number.

It is an amenable number.

3973869 is a deficient number, since it is larger than the sum of its proper divisors (2428371).

3973869 is a wasteful number, since it uses less digits than its factorization.

3973869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409 (or 1406 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3973869 is about 1993.4565458018. The cubic root of 3973869 is about 158.3936799208.

The spelling of 3973869 in words is "three million, nine hundred seventy-three thousand, eight hundred sixty-nine".