3647939663 has 6 divisors (see below), whose sum is σ = 3769412112. Its totient is φ = 3530263260.

The previous prime is 3647939653. The next prime is 3647939671. The reversal of 3647939663 is 3669397463.

It is a happy number.

It is not a de Polignac number, because 3647939663 - 2²⁸ = 3379504207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3647939599 and 3647939608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3647939653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1897031 + ... + 1898952.

It is an arithmetic number, because the mean of its divisors is an integer number (628235352).

Almost surely, 2^3647939663 is an apocalyptic number.

3647939663 is a deficient number, since it is larger than the sum of its proper divisors (121472449).

3647939663 is an equidigital number, since it uses as much as digits as its factorization.

3647939663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796045 (or 3796014 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 56.

The square root of 3647939663 is about 60398.1759906704. The cubic root of 3647939663 is about 1539.3919653655.

The spelling of 3647939663 in words is "three billion, six hundred forty-seven million, nine hundred thirty-nine thousand, six hundred sixty-three".