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642869119 is a prime number
BaseRepresentation
bin100110010100010…
…110011101111111
31122210200010122101
4212110112131333
52304033302434
6143442525531
721634203664
oct4624263577
91583603571
10642869119
112aa9790a2
1215b3668a7
13a3258339
1461545a6b
153b689b14
hex2651677f

642869119 has 2 divisors, whose sum is σ = 642869120. Its totient is φ = 642869118.

The previous prime is 642869111. The next prime is 642869147. The reversal of 642869119 is 911968246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642869119 - 23 = 642869111 is a prime.

It is a super-2 number, since 2×6428691192 = 826561408327672322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642869111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321434559 + 321434560.

It is an arithmetic number, because the mean of its divisors is an integer number (321434560).

Almost surely, 2642869119 is an apocalyptic number.

642869119 is a deficient number, since it is larger than the sum of its proper divisors (1).

642869119 is an equidigital number, since it uses as much as digits as its factorization.

642869119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 642869119 is about 25354.8638134777. The cubic root of 642869119 is about 863.0597334037.

The spelling of 642869119 in words is "six hundred forty-two million, eight hundred sixty-nine thousand, one hundred nineteen".