492143689 has 4 divisors (see below), whose sum is σ = 492250756. Its totient is φ = 492036624.

The previous prime is 492143683. The next prime is 492143699. The reversal of 492143689 is 986341294.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986341294 = 2 ⋅493170647.

It can be written as a sum of positive squares in 2 ways, for example, as 419553289 + 72590400 = 20483^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 492143689 - 2¹¹ = 492141641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492143683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46314 + ... + 55939.

It is an arithmetic number, because the mean of its divisors is an integer number (123062689).

Almost surely, 2^492143689 is an apocalyptic number.

It is an amenable number.

492143689 is a deficient number, since it is larger than the sum of its proper divisors (107067).

492143689 is a wasteful number, since it uses less digits than its factorization.

492143689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107066.

The product of its digits is 373248, while the sum is 46.

The square root of 492143689 is about 22184.3117765686. The cubic root of 492143689 is about 789.5215224697.

The spelling of 492143689 in words is "four hundred ninety-two million, one hundred forty-three thousand, six hundred eighty-nine".