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72765017 = 135597309
BaseRepresentation
bin1000101011001…
…00111001011001
312001220211211122
410111210321121
5122111440032
611115335025
71542330623
oct425447131
9161824748
1072765017
113808a486
1220451475
13120c9230
149941c13
1565c5012
hex4564e59

72765017 has 4 divisors (see below), whose sum is σ = 78362340. Its totient is φ = 67167696.

The previous prime is 72764983. The next prime is 72765019. The reversal of 72765017 is 71056727.

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 5180176 + 67584841 = 2276^2 + 8221^2 .

It is a cyclic number.

It is not a de Polignac number, because 72765017 - 28 = 72764761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72765019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798642 + ... + 2798667.

It is an arithmetic number, because the mean of its divisors is an integer number (19590585).

Almost surely, 272765017 is an apocalyptic number.

It is an amenable number.

72765017 is a deficient number, since it is larger than the sum of its proper divisors (5597323).

72765017 is a wasteful number, since it uses less digits than its factorization.

72765017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5597322.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 72765017 is about 8530.2413213226. The cubic root of 72765017 is about 417.4850021505.

The spelling of 72765017 in words is "seventy-two million, seven hundred sixty-five thousand, seventeen".

Divisors: 1 13 5597309 72765017