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195809623 is a prime number
BaseRepresentation
bin10111010101111…
…01000101010111
3111122110011022021
423222331011113
5400111401443
631232514011
74565232352
oct1352750527
9448404267
10195809623
11a0590739
12556ab907
133174aba9
141c011299
15122cc9ed
hexbabd157

195809623 has 2 divisors, whose sum is σ = 195809624. Its totient is φ = 195809622.

The previous prime is 195809569. The next prime is 195809633. The reversal of 195809623 is 326908591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-195809623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195809623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195809633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97904811 + 97904812.

It is an arithmetic number, because the mean of its divisors is an integer number (97904812).

Almost surely, 2195809623 is an apocalyptic number.

195809623 is a deficient number, since it is larger than the sum of its proper divisors (1).

195809623 is an equidigital number, since it uses as much as digits as its factorization.

195809623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 195809623 is about 13993.1991695966. The cubic root of 195809623 is about 580.6904411388.

The spelling of 195809623 in words is "one hundred ninety-five million, eight hundred nine thousand, six hundred twenty-three".