489969251 has 4 divisors (see below), whose sum is σ = 490079904. Its totient is φ = 489858600.

The previous prime is 489969241. The next prime is 489969269. The reversal of 489969251 is 152969984.

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

It is a cyclic number.

It is not a de Polignac number, because 489969251 - 2⁶ = 489969187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 489969193 and 489969202.

It is not an unprimeable number, because it can be changed into a prime (489969241) 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, 48395 + ... + 57636.

It is an arithmetic number, because the mean of its divisors is an integer number (122519976).

Almost surely, 2^489969251 is an apocalyptic number.

489969251 is a deficient number, since it is larger than the sum of its proper divisors (110653).

489969251 is a wasteful number, since it uses less digits than its factorization.

489969251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110652.

The product of its digits is 1399680, while the sum is 53.

The square root of 489969251 is about 22135.2490611694. The cubic root of 489969251 is about 788.3570250150.

The spelling of 489969251 in words is "four hundred eighty-nine million, nine hundred sixty-nine thousand, two hundred fifty-one".