3893984641 has 4 divisors (see below), whose sum is σ = 3895716784. Its totient is φ = 3892252500.

The previous prime is 3893984573. The next prime is 3893984651. The reversal of 3893984641 is 1464893983.

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 an emirpimes, since its reverse is a distinct semiprime: 1464893983 = 7 ⋅209270569.

It is a cyclic number.

It is not a de Polignac number, because 3893984641 - 2¹⁷ = 3893853569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3893984651) 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, 862695 + ... + 867196.

It is an arithmetic number, because the mean of its divisors is an integer number (973929196).

Almost surely, 2^3893984641 is an apocalyptic number.

It is an amenable number.

3893984641 is a deficient number, since it is larger than the sum of its proper divisors (1732143).

3893984641 is a wasteful number, since it uses less digits than its factorization.

3893984641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732142.

The product of its digits is 4478976, while the sum is 55.

The square root of 3893984641 is about 62401.7999820518. The cubic root of 3893984641 is about 1573.2512231469.

The spelling of 3893984641 in words is "three billion, eight hundred ninety-three million, nine hundred eighty-four thousand, six hundred forty-one".