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642038953 is a prime number
BaseRepresentation
bin100110010001001…
…011110010101001
31122202002221212111
4212101023302221
52303330221303
6143413042321
721624145453
oct4621136251
91582087774
10642038953
112aa461406
1215b0263a1
13a302750a
14613ab2d3
153b573b6d
hex2644bca9

642038953 has 2 divisors, whose sum is σ = 642038954. Its totient is φ = 642038952.

The previous prime is 642038909. The next prime is 642038963. The reversal of 642038953 is 359830246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614444944 + 27594009 = 24788^2 + 5253^2 .

It is a cyclic number.

It is not a de Polignac number, because 642038953 - 213 = 642030761 is a prime.

It is not a weakly prime, because it can be changed into another prime (642038963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321019476 + 321019477.

It is an arithmetic number, because the mean of its divisors is an integer number (321019477).

Almost surely, 2642038953 is an apocalyptic number.

It is an amenable number.

642038953 is a deficient number, since it is larger than the sum of its proper divisors (1).

642038953 is an equidigital number, since it uses as much as digits as its factorization.

642038953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 642038953 is about 25338.4875831215. The cubic root of 642038953 is about 862.6880706729.

The spelling of 642038953 in words is "six hundred forty-two million, thirty-eight thousand, nine hundred fifty-three".