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12191849 is a prime number
BaseRepresentation
bin101110100000…
…100001101001
3211221102001222
4232200201221
511110114344
61113151425
7205425515
oct56404151
924842058
1012191849
116977a0a
1240bb575
1326ab417
141895145
15110c5ee
hexba0869

12191849 has 2 divisors, whose sum is σ = 12191850. Its totient is φ = 12191848.

The previous prime is 12191831. The next prime is 12191899. The reversal of 12191849 is 94819121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 868624 = 3365^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 12191849 - 28 = 12191593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12191899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095924 + 6095925.

It is an arithmetic number, because the mean of its divisors is an integer number (6095925).

Almost surely, 212191849 is an apocalyptic number.

It is an amenable number.

12191849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191849 is an equidigital number, since it uses as much as digits as its factorization.

12191849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 12191849 is about 3491.6828321026. The cubic root of 12191849 is about 230.1564719759.

The spelling of 12191849 in words is "twelve million, one hundred ninety-one thousand, eight hundred forty-nine".