3957843 has 4 divisors (see below), whose sum is σ = 5277128. Its totient is φ = 2638560.

The previous prime is 3957839. The next prime is 3957847. The reversal of 3957843 is 3487593.

3957843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (3957839) and next prime (3957847).

It is not a de Polignac number, because 3957843 - 2² = 3957839 is a prime.

It is a d-powerful number, because it can be written as 3³ + 9³ + 5⁵ + 7³ + 8⁷ + 4⁹ + 3¹³ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3957847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659638 + ... + 659643.

It is an arithmetic number, because the mean of its divisors is an integer number (1319282).

Almost surely, 2^3957843 is an apocalyptic number.

3957843 is a deficient number, since it is larger than the sum of its proper divisors (1319285).

3957843 is a wasteful number, since it uses less digits than its factorization.

3957843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319284.

The product of its digits is 90720, while the sum is 39.

The square root of 3957843 is about 1989.4328337494. The cubic root of 3957843 is about 158.1804672953.

It can be divided in two parts, 39578 and 43, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 3957843 in words is "three million, nine hundred fifty-seven thousand, eight hundred forty-three".