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30421009 is a prime number
BaseRepresentation
bin111010000001…
…1000000010001
32010020112210001
41310003000101
530241433014
63004010001
7516400663
oct164030021
963215701
1030421009
1116198833
12a230901
1363c17c8
14407c533
152a0d974
hex1d03011

30421009 has 2 divisors, whose sum is σ = 30421010. Its totient is φ = 30421008.

The previous prime is 30421003. The next prime is 30421021. The reversal of 30421009 is 90012403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27531009 + 2890000 = 5247^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 30421009 - 25 = 30420977 is a prime.

It is not a weakly prime, because it can be changed into another prime (30421003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210504 + 15210505.

It is an arithmetic number, because the mean of its divisors is an integer number (15210505).

Almost surely, 230421009 is an apocalyptic number.

It is an amenable number.

30421009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30421009 is an equidigital number, since it uses as much as digits as its factorization.

30421009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30421009 is about 5515.5243631046. The cubic root of 30421009 is about 312.1700290907.

The spelling of 30421009 in words is "thirty million, four hundred twenty-one thousand, nine".