489157923 has 4 divisors (see below), whose sum is σ = 652210568. Its totient is φ = 326105280.

The previous prime is 489157909. The next prime is 489157931. The reversal of 489157923 is 329751984.

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

It is not a de Polignac number, because 489157923 - 2⁵ = 489157891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489157423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81526318 + ... + 81526323.

It is an arithmetic number, because the mean of its divisors is an integer number (163052642).

Almost surely, 2^489157923 is an apocalyptic number.

489157923 is a deficient number, since it is larger than the sum of its proper divisors (163052645).

489157923 is a wasteful number, since it uses less digits than its factorization.

489157923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163052644.

The product of its digits is 544320, while the sum is 48.

The square root of 489157923 is about 22116.9148617071. The cubic root of 489157923 is about 787.9216442956.

The spelling of 489157923 in words is "four hundred eighty-nine million, one hundred fifty-seven thousand, nine hundred twenty-three".