3871429321 has 2 divisors, whose sum is σ = 3871429322. Its totient is φ = 3871429320.

The previous prime is 3871429319. The next prime is 3871429349. The reversal of 3871429321 is 1239241783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3255843600 + 615585721 = 57060^2 + 24811^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871429321 - 2¹ = 3871429319 is a prime.

Together with 3871429319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3871429351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935714660 + 1935714661.

It is an arithmetic number, because the mean of its divisors is an integer number (1935714661).

Almost surely, 2^3871429321 is an apocalyptic number.

It is an amenable number.

3871429321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871429321 is an equidigital number, since it uses as much as digits as its factorization.

3871429321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 3871429321 is about 62220.8109960004. The cubic root of 3871429321 is about 1570.2077322598.

The spelling of 3871429321 in words is "three billion, eight hundred seventy-one million, four hundred twenty-nine thousand, three hundred twenty-one".