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9966139 is a prime number
BaseRepresentation
bin100110000001…
…001000111011
3200202022222021
4212001020323
510022404024
6553335311
7150465541
oct46011073
920668867
109966139
115697787
123407537
1320ac331
141475d91
15d1cde4
hex98123b

9966139 has 2 divisors, whose sum is σ = 9966140. Its totient is φ = 9966138.

The previous prime is 9966137. The next prime is 9966167. The reversal of 9966139 is 9316699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9966139 - 21 = 9966137 is a prime.

Together with 9966137, it forms a pair of twin primes.

9966139 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9966095 and 9966104.

It is not a weakly prime, because it can be changed into another prime (9966137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983069 + 4983070.

It is an arithmetic number, because the mean of its divisors is an integer number (4983070).

Almost surely, 29966139 is an apocalyptic number.

9966139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9966139 is an equidigital number, since it uses as much as digits as its factorization.

9966139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 43.

The square root of 9966139 is about 3156.9192260810. The cubic root of 9966139 is about 215.2000229751.

The spelling of 9966139 in words is "nine million, nine hundred sixty-six thousand, one hundred thirty-nine".