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72084097 = 179974253
BaseRepresentation
bin1000100101111…
…10101010000001
312000122020210101
410102332222001
5121423142342
611053002401
71533463501
oct422765201
9160566711
1072084097
1137764938
1220183401
1311c1b317
149805a01
1564dd3b7
hex44bea81

72084097 has 8 divisors (see below), whose sum is σ = 76418856. Its totient is φ = 67759872.

The previous prime is 72084079. The next prime is 72084107. The reversal of 72084097 is 79048027.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17338896 + 54745201 = 4164^2 + 7399^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72084097 - 219 = 71559809 is a prime.

It is a super-2 number, since 2×720840972 = 10392234080610818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72084197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14823 + ... + 19075.

It is an arithmetic number, because the mean of its divisors is an integer number (9552357).

Almost surely, 272084097 is an apocalyptic number.

It is an amenable number.

72084097 is a deficient number, since it is larger than the sum of its proper divisors (4334759).

72084097 is a wasteful number, since it uses less digits than its factorization.

72084097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 72084097 is about 8490.2353913187. The cubic root of 72084097 is about 416.1786727095.

The spelling of 72084097 in words is "seventy-two million, eighty-four thousand, ninety-seven".

Divisors: 1 17 997 4253 16949 72301 4240241 72084097