3966858289 has 3 divisors (see below), whose sum is σ = 3966921273. Its totient is φ = 3966795306.

The previous prime is 3966858283. The next prime is 3966858331. The reversal of 3966858289 is 9828586693.

It is a happy number.

The square root of 3966858289 is 62983.

It is a perfect power (a square), and thus also a powerful number.

3966858289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3966858289 - 2⁵ = 3966858257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3966858289.

It is not an unprimeable number, because it can be changed into a prime (3966858283) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31492 + ... + 94474.

It is an arithmetic number, because the mean of its divisors is an integer number (1322307091).

Almost surely, 2^3966858289 is an apocalyptic number.

3966858289 is the 62983-rd square number.

3966858289 is the 31492-nd centered octagonal number.

It is an amenable number.

3966858289 is a deficient number, since it is larger than the sum of its proper divisors (62984).

3966858289 is an frugal number, since it uses more digits than its factorization.

3966858289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125966 (or 62983 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 64.

The cubic root of 3966858289 is about 1583.0047889712.

Multiplying 3966858289 by its sum of digits (64), we get a square (253878930496 = 503864²).

The spelling of 3966858289 in words is "three billion, nine hundred sixty-six million, eight hundred fifty-eight thousand, two hundred eighty-nine".