3640613 has 4 divisors (see below), whose sum is σ = 3644928. Its totient is φ = 3636300.

The previous prime is 3640597. The next prime is 3640633. The reversal of 3640613 is 3160463.

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: 3160463 = 1597 ⋅1979.

It is a cyclic number.

It is not a de Polignac number, because 3640613 - 2⁴ = 3640597 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 (3640633) 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, 431 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (911232).

Almost surely, 2^3640613 is an apocalyptic number.

It is an amenable number.

3640613 is a deficient number, since it is larger than the sum of its proper divisors (4315).

3640613 is a wasteful number, since it uses less digits than its factorization.

3640613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 3640613 is about 1908.0390457221. The cubic root of 3640613 is about 153.8360683196.

The spelling of 3640613 in words is "three million, six hundred forty thousand, six hundred thirteen".