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80470489 = 117315499
BaseRepresentation
bin1001100101111…
…10000111011001
312121102022202111
410302332013121
5131100023424
611552432321
71664662561
oct462760731
9177368674
1080470489
1141472740
1222b486a1
1313896598
14a989da1
1570e8194
hex4cbe1d9

80470489 has 4 divisors (see below), whose sum is σ = 87786000. Its totient is φ = 73154980.

The previous prime is 80470487. The next prime is 80470493. The reversal of 80470489 is 98407408.

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 80470489 - 21 = 80470487 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80470487) 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, 3657739 + ... + 3657760.

It is an arithmetic number, because the mean of its divisors is an integer number (21946500).

Almost surely, 280470489 is an apocalyptic number.

It is an amenable number.

80470489 is a deficient number, since it is larger than the sum of its proper divisors (7315511).

80470489 is a wasteful number, since it uses less digits than its factorization.

80470489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7315510.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 80470489 is about 8970.5344879778. The cubic root of 80470489 is about 431.7299856597.

The spelling of 80470489 in words is "eighty million, four hundred seventy thousand, four hundred eighty-nine".

Divisors: 1 11 7315499 80470489