4086942989 has 4 divisors (see below), whose sum is σ = 4087094460. Its totient is φ = 4086791520.

The previous prime is 4086942949. The next prime is 4086943009. The reversal of 4086942989 is 9892496804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1470108964 + 2616834025 = 38342^2 + 51155^2 .

It is a cyclic number.

It is not a de Polignac number, because 4086942989 - 2⁸ = 4086942733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4086942949) 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, 23042 + ... + 93299.

It is an arithmetic number, because the mean of its divisors is an integer number (1021773615).

Almost surely, 2^4086942989 is an apocalyptic number.

It is an amenable number.

4086942989 is a deficient number, since it is larger than the sum of its proper divisors (151471).

4086942989 is a wasteful number, since it uses less digits than its factorization.

4086942989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151470.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The square root of 4086942989 is about 63929.2029435688. The cubic root of 4086942989 is about 1598.8198314080.

The spelling of 4086942989 in words is "four billion, eighty-six million, nine hundred forty-two thousand, nine hundred eighty-nine".