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9727201 = 114911801

9727201 has 8 divisors (see below), whose sum is σ = 10639008. Its totient is φ = 8820000.

The previous prime is 9727199. The next prime is 9727219. The reversal of 9727201 is 1027279.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 2-Lehmer number, since φ(9727201) divides (9727201-1)2.

It is a cyclic number.

It is not a de Polignac number, because 9727201 - 21 = 9727199 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 9727201.

It is not an unprimeable number, because it can be changed into a prime (9727231) 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 7 ways as a sum of consecutive naturals, for example, 4501 + ... + 6301.

It is an arithmetic number, because the mean of its divisors is an integer number (1329876).

Almost surely, 29727201 is an apocalyptic number.

9727201 is the 1801-st octagonal number.

It is an amenable number.

9727201 is a deficient number, since it is larger than the sum of its proper divisors (911807).

9727201 is a wasteful number, since it uses less digits than its factorization.

9727201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 9727201 is about 3118.8461007238. The cubic root of 9727201 is about 213.4662872944.

The spelling of 9727201 in words is "nine million, seven hundred twenty-seven thousand, two hundred one".

Divisors: 1 11 491 1801 5401 19811 884291 9727201