3641639 has 4 divisors (see below), whose sum is σ = 3701400. Its totient is φ = 3581880.

The previous prime is 3641633. The next prime is 3641641. The reversal of 3641639 is 9361463.

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: 9361463 = 1907 ⋅4909.

It is a cyclic number.

It is not a de Polignac number, because 3641639 - 2⁴ = 3641623 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 (3641633) 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, 29789 + ... + 29910.

It is an arithmetic number, because the mean of its divisors is an integer number (925350).

Almost surely, 2^3641639 is an apocalyptic number.

3641639 is a deficient number, since it is larger than the sum of its proper divisors (59761).

3641639 is an equidigital number, since it uses as much as digits as its factorization.

3641639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59760.

The product of its digits is 11664, while the sum is 32.

The square root of 3641639 is about 1908.3078892045. The cubic root of 3641639 is about 153.8505183569.

The spelling of 3641639 in words is "three million, six hundred forty-one thousand, six hundred thirty-nine".