3943457 has 4 divisors (see below), whose sum is σ = 4506816. Its totient is φ = 3380100.

The previous prime is 3943451. The next prime is 3943481. The reversal of 3943457 is 7543493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7543493 = 199 ⋅37907.

It is a cyclic number.

It is not a de Polignac number, because 3943457 - 2¹² = 3939361 is a prime.

It is a super-2 number, since 2×3943457² = 31101706221698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3943451) 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, 281669 + ... + 281682.

It is an arithmetic number, because the mean of its divisors is an integer number (1126704).

Almost surely, 2^3943457 is an apocalyptic number.

It is an amenable number.

3943457 is a deficient number, since it is larger than the sum of its proper divisors (563359).

3943457 is an equidigital number, since it uses as much as digits as its factorization.

3943457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563358.

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

The square root of 3943457 is about 1985.8139389177. The cubic root of 3943457 is about 157.9885827353.

The spelling of 3943457 in words is "three million, nine hundred forty-three thousand, four hundred fifty-seven".