3896948639 has 4 divisors (see below), whose sum is σ = 3897897024. Its totient is φ = 3896000256.

The previous prime is 3896948633. The next prime is 3896948683. The reversal of 3896948639 is 9368496983.

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 3896948639 - 2⁸ = 3896948383 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 (3896948633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468002 + ... + 476255.

It is an arithmetic number, because the mean of its divisors is an integer number (974474256).

Almost surely, 2^3896948639 is an apocalyptic number.

3896948639 is a deficient number, since it is larger than the sum of its proper divisors (948385).

3896948639 is an equidigital number, since it uses as much as digits as its factorization.

3896948639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948384.

The product of its digits is 60466176, while the sum is 65.

The square root of 3896948639 is about 62425.5447633419. The cubic root of 3896948639 is about 1573.6502943009.

The spelling of 3896948639 in words is "three billion, eight hundred ninety-six million, nine hundred forty-eight thousand, six hundred thirty-nine".