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163719121 is a prime number
BaseRepresentation
bin10011100001000…
…10011111010001
3102102001210102011
421300202133101
5313403002441
624125022521
74025406136
oct1160423721
9372053364
10163719121
1184462665
12469b4a41
1327bc3527
1417a5a58d
15e58e581
hex9c227d1

163719121 has 2 divisors, whose sum is σ = 163719122. Its totient is φ = 163719120.

The previous prime is 163719107. The next prime is 163719131. The reversal of 163719121 is 121917361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158130625 + 5588496 = 12575^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 163719121 - 25 = 163719089 is a prime.

It is not a weakly prime, because it can be changed into another prime (163719131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81859560 + 81859561.

It is an arithmetic number, because the mean of its divisors is an integer number (81859561).

Almost surely, 2163719121 is an apocalyptic number.

It is an amenable number.

163719121 is a deficient number, since it is larger than the sum of its proper divisors (1).

163719121 is an equidigital number, since it uses as much as digits as its factorization.

163719121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 163719121 is about 12795.2772928139. The cubic root of 163719121 is about 547.0576993969.

The spelling of 163719121 in words is "one hundred sixty-three million, seven hundred nineteen thousand, one hundred twenty-one".