3912566989 has 4 divisors (see below), whose sum is σ = 3929359356. Its totient is φ = 3895774624.

The previous prime is 3912566969. The next prime is 3912566993. The reversal of 3912566989 is 9896652193.

3912566989 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 9896652193 = 151 ⋅65540743.

It can be written as a sum of positive squares in 2 ways, for example, as 2767286025 + 1145280964 = 52605^2 + 33842^2 .

It is a cyclic number.

It is not a de Polignac number, because 3912566989 - 2¹¹ = 3912564941 is a prime.

It is a super-2 number, since 2×3912566989² = 30616360886825052242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3912566969) 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, 8395834 + ... + 8396299.

It is an arithmetic number, because the mean of its divisors is an integer number (982339839).

Almost surely, 2^3912566989 is an apocalyptic number.

It is an amenable number.

3912566989 is a deficient number, since it is larger than the sum of its proper divisors (16792367).

3912566989 is a wasteful number, since it uses less digits than its factorization.

3912566989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16792366.

The product of its digits is 6298560, while the sum is 58.

The square root of 3912566989 is about 62550.5154974761. The cubic root of 3912566989 is about 1575.7498052770.

The spelling of 3912566989 in words is "three billion, nine hundred twelve million, five hundred sixty-six thousand, nine hundred eighty-nine".