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489715561 = 4311136231
BaseRepresentation
bin11101001100000…
…111011101101001
31021010111010110101
4131030013131221
52000331344221
6120332145401
715064341106
oct3514073551
91233433411
10489715561
11231482605
12118008261
137a5c3c2a
1449079aad
152ced5d91
hex1d307769

489715561 has 4 divisors (see below), whose sum is σ = 490852224. Its totient is φ = 488578900.

The previous prime is 489715559. The next prime is 489715571. The reversal of 489715561 is 165517984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 489715561 - 21 = 489715559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489715511) 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, 567685 + ... + 568546.

It is an arithmetic number, because the mean of its divisors is an integer number (122713056).

Almost surely, 2489715561 is an apocalyptic number.

It is an amenable number.

489715561 is a deficient number, since it is larger than the sum of its proper divisors (1136663).

489715561 is a wasteful number, since it uses less digits than its factorization.

489715561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136662.

The product of its digits is 302400, while the sum is 46.

The square root of 489715561 is about 22129.5178664154. The cubic root of 489715561 is about 788.2209397262.

The spelling of 489715561 in words is "four hundred eighty-nine million, seven hundred fifteen thousand, five hundred sixty-one".

Divisors: 1 431 1136231 489715561