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23491009 is a prime number
BaseRepresentation
bin101100110011…
…1000111000001
31122012110121101
41121213013001
522003203014
62155254401
7403445623
oct131470701
948173541
1023491009
1112295163
127a4a401
134b36409
143196c13
1520e0474
hex16671c1

23491009 has 2 divisors, whose sum is σ = 23491010. Its totient is φ = 23491008.

The previous prime is 23491003. The next prime is 23491019. The reversal of 23491009 is 90019432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 6656400 = 4103^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 23491009 - 23 = 23491001 is a prime.

It is not a weakly prime, because it can be changed into another prime (23491001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11745504 + 11745505.

It is an arithmetic number, because the mean of its divisors is an integer number (11745505).

Almost surely, 223491009 is an apocalyptic number.

It is an amenable number.

23491009 is a deficient number, since it is larger than the sum of its proper divisors (1).

23491009 is an equidigital number, since it uses as much as digits as its factorization.

23491009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 23491009 is about 4846.7524178567. The cubic root of 23491009 is about 286.3961818267.

The spelling of 23491009 in words is "twenty-three million, four hundred ninety-one thousand, nine".