3862128989 has 2 divisors, whose sum is σ = 3862128990. Its totient is φ = 3862128988.

The previous prime is 3862128971. The next prime is 3862129043. The reversal of 3862128989 is 9898212683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3475692025 + 386436964 = 58955^2 + 19658^2 .

It is an emirp because it is prime and its reverse (9898212683) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3862128989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3862128089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1931064494 + 1931064495.

It is an arithmetic number, because the mean of its divisors is an integer number (1931064495).

Almost surely, 2^3862128989 is an apocalyptic number.

It is an amenable number.

3862128989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3862128989 is an equidigital number, since it uses as much as digits as its factorization.

3862128989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The square root of 3862128989 is about 62146.0295513720. The cubic root of 3862128989 is about 1568.9493544021.

The spelling of 3862128989 in words is "three billion, eight hundred sixty-two million, one hundred twenty-eight thousand, nine hundred eighty-nine".