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30000013 = 79401947
BaseRepresentation
bin111001001110…
…0001110001101
32002110011021121
41302130032031
530140000023
62551000541
7512665411
oct162341615
962404247
1030000013
1115a304aa
12a069151
1362a4cb4
143dacd41
152978d5d
hex1c9c38d

30000013 has 8 divisors (see below), whose sum is σ = 30487680. Its totient is φ = 29515200.

The previous prime is 30000001. The next prime is 30000023. The reversal of 30000013 is 31000003.

It is a happy number.

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 30000013 - 217 = 29868941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29999960 and 30000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000023) 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 7 ways as a sum of consecutive naturals, for example, 31206 + ... + 32152.

It is an arithmetic number, because the mean of its divisors is an integer number (3810960).

Almost surely, 230000013 is an apocalyptic number.

It is an amenable number.

30000013 is a deficient number, since it is larger than the sum of its proper divisors (487667).

30000013 is an equidigital number, since it uses as much as digits as its factorization.

30000013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

The product of its (nonzero) digits is 9, while the sum is 7.

The square root of 30000013 is about 5477.2267617837. The cubic root of 30000013 is about 310.7232954776.

Adding to 30000013 its reverse (31000003), we get a palindrome (61000016).

The spelling of 30000013 in words is "thirty million, thirteen", and thus it is an aban number and an uban number.

Divisors: 1 79 401 947 31679 74813 379747 30000013