3913605 has 12 divisors (see below), whose sum is σ = 6783660. Its totient is φ = 2087232.

The previous prime is 3913589. The next prime is 3913627. The reversal of 3913605 is 5063193.

It can be written as a sum of positive squares in 2 ways, for example, as 431649 + 3481956 = 657^2 + 1866^2 .

It is not a de Polignac number, because 3913605 - 2⁴ = 3913589 is a prime.

It is an Ulam number.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43440 + ... + 43529.

It is an arithmetic number, because the mean of its divisors is an integer number (565305).

Almost surely, 2^3913605 is an apocalyptic number.

It is an amenable number.

3913605 is a deficient number, since it is larger than the sum of its proper divisors (2870055).

3913605 is a wasteful number, since it uses less digits than its factorization.

3913605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86980 (or 86977 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 3913605 is about 1978.2833467428. The cubic root of 3913605 is about 157.5889142700.

Adding to 3913605 its reverse (5063193), we get a palindrome (8976798).

The spelling of 3913605 in words is "three million, nine hundred thirteen thousand, six hundred five".