3953905 has 4 divisors (see below), whose sum is σ = 4744692. Its totient is φ = 3163120.

The previous prime is 3953879. The next prime is 3953909. The reversal of 3953905 is 5093593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5093593 = 367 ⋅13879.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 1739761 = 1488^2 + 1319^2 .

It is not a de Polignac number, because 3953905 - 2⁹ = 3953393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3953909) 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, 395386 + ... + 395395.

It is an arithmetic number, because the mean of its divisors is an integer number (1186173).

Almost surely, 2^3953905 is an apocalyptic number.

It is an amenable number.

3953905 is a deficient number, since it is larger than the sum of its proper divisors (790787).

3953905 is an equidigital number, since it uses as much as digits as its factorization.

3953905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790786.

The product of its (nonzero) digits is 18225, while the sum is 34.

The square root of 3953905 is about 1988.4428581179. The cubic root of 3953905 is about 158.1279874141.

The spelling of 3953905 in words is "three million, nine hundred fifty-three thousand, nine hundred five".