489121787 has 16 divisors (see below), whose sum is σ = 612499200. Its totient is φ = 379455840.

The previous prime is 489121783. The next prime is 489121793. The reversal of 489121787 is 787121984.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 489121787 - 2² = 489121783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489121781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3764 + ... + 31502.

It is an arithmetic number, because the mean of its divisors is an integer number (38281200).

Almost surely, 2^489121787 is an apocalyptic number.

489121787 is a deficient number, since it is larger than the sum of its proper divisors (123377413).

489121787 is a wasteful number, since it uses less digits than its factorization.

489121787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27986.

The product of its digits is 225792, while the sum is 47.

The square root of 489121787 is about 22116.0979153195. The cubic root of 489121787 is about 787.9022415381.

The spelling of 489121787 in words is "four hundred eighty-nine million, one hundred twenty-one thousand, seven hundred eighty-seven".