3945437 has 4 divisors (see below), whose sum is σ = 3949440. Its totient is φ = 3941436.

The previous prime is 3945427. The next prime is 3945449. The reversal of 3945437 is 7345493.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7345493 = 227 ⋅32359.

It is a cyclic number.

It is not a de Polignac number, because 3945437 - 2¹⁴ = 3929053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3945397 and 3945406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945427) 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, 638 + ... + 2880.

It is an arithmetic number, because the mean of its divisors is an integer number (987360).

Almost surely, 2^3945437 is an apocalyptic number.

It is an amenable number.

3945437 is a deficient number, since it is larger than the sum of its proper divisors (4003).

3945437 is a wasteful number, since it uses less digits than its factorization.

3945437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002.

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

The square root of 3945437 is about 1986.3124124870. The cubic root of 3945437 is about 158.0150202032.

The spelling of 3945437 in words is "three million, nine hundred forty-five thousand, four hundred thirty-seven".