489651905 has 4 divisors (see below), whose sum is σ = 587582292. Its totient is φ = 391721520.

The previous prime is 489651893. The next prime is 489651917. The reversal of 489651905 is 509156984.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (489651893) and next prime (489651917).

It can be written as a sum of positive squares in 2 ways, for example, as 372644416 + 117007489 = 19304^2 + 10817^2 .

It is not a de Polignac number, because 489651905 - 2⁸ = 489651649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489651905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48965186 + ... + 48965195.

It is an arithmetic number, because the mean of its divisors is an integer number (146895573).

Almost surely, 2^489651905 is an apocalyptic number.

It is an amenable number.

489651905 is a deficient number, since it is larger than the sum of its proper divisors (97930387).

489651905 is an equidigital number, since it uses as much as digits as its factorization.

489651905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97930386.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 489651905 is about 22128.0795596907. The cubic root of 489651905 is about 788.1867857735.

The spelling of 489651905 in words is "four hundred eighty-nine million, six hundred fifty-one thousand, nine hundred five".