3967638963 has 4 divisors (see below), whose sum is σ = 5290185288. Its totient is φ = 2645092640.

The previous prime is 3967638931. The next prime is 3967638971. The reversal of 3967638963 is 3698367693.

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 3967638963 - 2⁵ = 3967638931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3967638897 and 3967638906.

It is not an unprimeable number, because it can be changed into a prime (3967638923) 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, 661273158 + ... + 661273163.

It is an arithmetic number, because the mean of its divisors is an integer number (1322546322).

Almost surely, 2^3967638963 is an apocalyptic number.

3967638963 is a deficient number, since it is larger than the sum of its proper divisors (1322546325).

3967638963 is a wasteful number, since it uses less digits than its factorization.

3967638963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322546324.

The product of its digits is 26453952, while the sum is 60.

The square root of 3967638963 is about 62989.1971928520. The cubic root of 3967638963 is about 1583.1086267803.

The spelling of 3967638963 in words is "three billion, nine hundred sixty-seven million, six hundred thirty-eight thousand, nine hundred sixty-three".