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93030145 = 5132575569
BaseRepresentation
bin1011000101110…
…00011100000001
320111001102100221
411202320130001
5142303431040
613121543041
72206512625
oct542703401
9214042327
1093030145
1148570a1a
12271a4a81
1316373230
14c4d9185
15827974a
hex58b8701

93030145 has 16 divisors (see below), whose sum is σ = 120713040. Its totient is φ = 68419584.

The previous prime is 93030139. The next prime is 93030181. The reversal of 93030145 is 54103039.

It can be written as a sum of positive squares in 8 ways, for example, as 1100401 + 91929744 = 1049^2 + 9588^2 .

It is a 3-Lehmer number, since φ(93030145) divides (93030145-1)3.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 93030145 - 217 = 92899073 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13921 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (7544565).

It is a Poulet number, since it divides 293030144-1.

Almost surely, 293030145 is an apocalyptic number.

93030145 is the 5569-th octagonal number.

It is an amenable number.

93030145 is a deficient number, since it is larger than the sum of its proper divisors (27682895).

93030145 is a wasteful number, since it uses less digits than its factorization.

93030145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5844.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 93030145 is about 9645.2135798022. The cubic root of 93030145 is about 453.1144365036.

The spelling of 93030145 in words is "ninety-three million, thirty thousand, one hundred forty-five".

Divisors: 1 5 13 65 257 1285 3341 5569 16705 27845 72397 361985 1431233 7156165 18606029 93030145