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489997 = 1573121
BaseRepresentation
bin1110111101000001101
3220220011001
41313220031
5111134442
614300301
74110364
oct1675015
9826131
10489997
11305162
121b7691
13142051
14ca7db
159a2b7
hex77a0d

489997 has 4 divisors (see below), whose sum is σ = 493276. Its totient is φ = 486720.

The previous prime is 489989. The next prime is 490001. The reversal of 489997 is 799984.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 447561 = 206^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 489997 - 23 = 489989 is a prime.

It is a deceptive number, since it divides R489996.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1404 + ... + 1717.

It is an arithmetic number, because the mean of its divisors is an integer number (123319).

It is a Poulet number, since it divides 2489996-1.

2489997 is an apocalyptic number.

It is an amenable number.

489997 is a deficient number, since it is larger than the sum of its proper divisors (3279).

489997 is a wasteful number, since it uses less digits than its factorization.

489997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3278.

The product of its digits is 163296, while the sum is 46.

The square root of 489997 is about 699.9978571396. The cubic root of 489997 is about 78.8371907382.

The spelling of 489997 in words is "four hundred eighty-nine thousand, nine hundred ninety-seven".

Divisors: 1 157 3121 489997