3968221429 has 4 divisors (see below), whose sum is σ = 4018452160. Its totient is φ = 3917990700.

The previous prime is 3968221427. The next prime is 3968221457. The reversal of 3968221429 is 9241228693.

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.

It is a cyclic number.

It is not a de Polignac number, because 3968221429 - 2¹ = 3968221427 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 (3968221427) 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, 25115247 + ... + 25115404.

It is an arithmetic number, because the mean of its divisors is an integer number (1004613040).

Almost surely, 2^3968221429 is an apocalyptic number.

It is an amenable number.

3968221429 is a deficient number, since it is larger than the sum of its proper divisors (50230731).

3968221429 is an equidigital number, since it uses as much as digits as its factorization.

3968221429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50230730.

The product of its digits is 373248, while the sum is 46.

The square root of 3968221429 is about 62993.8205620202. The cubic root of 3968221429 is about 1583.1860919797.

The spelling of 3968221429 in words is "three billion, nine hundred sixty-eight million, two hundred twenty-one thousand, four hundred twenty-nine".