3871969697 has 2 divisors, whose sum is σ = 3871969698. Its totient is φ = 3871969696.

The previous prime is 3871969669. The next prime is 3871969711. The reversal of 3871969697 is 7969691783.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2382318481 + 1489651216 = 48809^2 + 38596^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871969697 - 2⁸ = 3871969441 is a prime.

It is not a weakly prime, because it can be changed into another prime (3871962697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935984848 + 1935984849.

It is an arithmetic number, because the mean of its divisors is an integer number (1935984849).

Almost surely, 2^3871969697 is an apocalyptic number.

It is an amenable number.

3871969697 is a deficient number, since it is larger than the sum of its proper divisors (1).

3871969697 is an equidigital number, since it uses as much as digits as its factorization.

3871969697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 65.

The square root of 3871969697 is about 62225.1532501126. The cubic root of 3871969697 is about 1570.2807856490.

The spelling of 3871969697 in words is "three billion, eight hundred seventy-one million, nine hundred sixty-nine thousand, six hundred ninety-seven".