3643739 has 4 divisors (see below), whose sum is σ = 3975000. Its totient is φ = 3312480.

The previous prime is 3643733. The next prime is 3643747. The reversal of 3643739 is 9373463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3643739 - 2⁸ = 3643483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3643699 and 3643708.

It is not an unprimeable number, because it can be changed into a prime (3643733) 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, 165614 + ... + 165635.

It is an arithmetic number, because the mean of its divisors is an integer number (993750).

Almost surely, 2^3643739 is an apocalyptic number.

3643739 is a deficient number, since it is larger than the sum of its proper divisors (331261).

3643739 is a wasteful number, since it uses less digits than its factorization.

3643739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331260.

The product of its digits is 40824, while the sum is 35.

The square root of 3643739 is about 1908.8580355804. The cubic root of 3643739 is about 153.8800859962.

The spelling of 3643739 in words is "three million, six hundred forty-three thousand, seven hundred thirty-nine".