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42204389 is a prime number
BaseRepresentation
bin1010000011111…
…1110011100101
32221102012112112
42200333303211
541301020024
64104330405
71021505603
oct240776345
987365475
1042204389
1121906867
1212173a05
138989016
145868873
153a8a00e
hex283fce5

42204389 has 2 divisors, whose sum is σ = 42204390. Its totient is φ = 42204388.

The previous prime is 42204373. The next prime is 42204391. The reversal of 42204389 is 98340224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 6980164 = 5935^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 42204389 - 24 = 42204373 is a prime.

Together with 42204391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42204989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21102194 + 21102195.

It is an arithmetic number, because the mean of its divisors is an integer number (21102195).

Almost surely, 242204389 is an apocalyptic number.

It is an amenable number.

42204389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42204389 is an equidigital number, since it uses as much as digits as its factorization.

42204389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 42204389 is about 6496.4905141161. The cubic root of 42204389 is about 348.1656107196.

The spelling of 42204389 in words is "forty-two million, two hundred four thousand, three hundred eighty-nine".