3945743 has 4 divisors (see below), whose sum is σ = 4012680. Its totient is φ = 3878808.

The previous prime is 3945731. The next prime is 3945757. The reversal of 3945743 is 3475493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3475493 = 7 ⋅496499.

It is a cyclic number.

It is not a de Polignac number, because 3945743 - 2⁴ = 3945727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33380 + ... + 33497.

It is an arithmetic number, because the mean of its divisors is an integer number (1003170).

Almost surely, 2^3945743 is an apocalyptic number.

3945743 is a deficient number, since it is larger than the sum of its proper divisors (66937).

3945743 is an equidigital number, since it uses as much as digits as its factorization.

3945743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66936.

The product of its digits is 45360, while the sum is 35.

The square root of 3945743 is about 1986.3894381515. The cubic root of 3945743 is about 158.0191052045.

The spelling of 3945743 in words is "three million, nine hundred forty-five thousand, seven hundred forty-three".