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172028587 is a prime number
BaseRepresentation
bin10100100000011…
…11001010101011
3102222200221212011
422100033022223
5323014403322
625023100351
74156135033
oct1220171253
9388627764
10172028587
1189118695
12497416b7
1329842783
1418bc08c3
1510181677
hexa40f2ab

172028587 has 2 divisors, whose sum is σ = 172028588. Its totient is φ = 172028586.

The previous prime is 172028581. The next prime is 172028611. The reversal of 172028587 is 785820271.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-172028587 is a prime.

It is a super-3 number, since 3×1720285873 (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (172028581) 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 as a sum of consecutive naturals, namely, 86014293 + 86014294.

It is an arithmetic number, because the mean of its divisors is an integer number (86014294).

Almost surely, 2172028587 is an apocalyptic number.

172028587 is a deficient number, since it is larger than the sum of its proper divisors (1).

172028587 is an equidigital number, since it uses as much as digits as its factorization.

172028587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 172028587 is about 13115.9668724803. The cubic root of 172028587 is about 556.1605851816.

The spelling of 172028587 in words is "one hundred seventy-two million, twenty-eight thousand, five hundred eighty-seven".