3899641 has 4 divisors (see below), whose sum is σ = 3916900. Its totient is φ = 3882384.

The previous prime is 3899639. The next prime is 3899653. The reversal of 3899641 is 1469983.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3404025 + 495616 = 1845^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 3899641 - 2¹ = 3899639 is a prime.

It is a Duffinian number.

3899641 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3899594 and 3899603.

It is not an unprimeable number, because it can be changed into a prime (3899611) 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, 8286 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (979225).

Almost surely, 2^3899641 is an apocalyptic number.

It is an amenable number.

3899641 is a deficient number, since it is larger than the sum of its proper divisors (17259).

3899641 is a wasteful number, since it uses less digits than its factorization.

3899641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17258.

The product of its digits is 46656, while the sum is 40.

The square root of 3899641 is about 1974.7508703631. The cubic root of 3899641 is about 157.4012617041.

The spelling of 3899641 in words is "three million, eight hundred ninety-nine thousand, six hundred forty-one".