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230793557 = 391758921
BaseRepresentation
bin11011100000110…
…10000101010101
3121002021112020112
431300122011111
5433040343212
634522412405
75501466341
oct1560320525
9532245215
10230793557
11109305685
1265361105
1338a79547
142291a621
15153dd422
hexdc1a155

230793557 has 4 divisors (see below), whose sum is σ = 230856396. Its totient is φ = 230730720.

The previous prime is 230793533. The next prime is 230793559. The reversal of 230793557 is 755397032.

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 125238481 + 105555076 = 11191^2 + 10274^2 .

It is a cyclic number.

It is not a de Polignac number, because 230793557 - 28 = 230793301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230793559) 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, 25544 + ... + 33377.

It is an arithmetic number, because the mean of its divisors is an integer number (57714099).

Almost surely, 2230793557 is an apocalyptic number.

It is an amenable number.

230793557 is a deficient number, since it is larger than the sum of its proper divisors (62839).

230793557 is an equidigital number, since it uses as much as digits as its factorization.

230793557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62838.

The product of its (nonzero) digits is 198450, while the sum is 41.

The square root of 230793557 is about 15191.8911594311. The cubic root of 230793557 is about 613.3964057367.

The spelling of 230793557 in words is "two hundred thirty million, seven hundred ninety-three thousand, five hundred fifty-seven".

Divisors: 1 3917 58921 230793557