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12191077 is a prime number
BaseRepresentation
bin101110100000…
…010101100101
3211221101000101
4232200111211
511110103302
61113144101
7205423333
oct56402545
924841011
1012191077
116977378
1240bb031
1326aac72
141894b53
15110c287
hexba0565

12191077 has 2 divisors, whose sum is σ = 12191078. Its totient is φ = 12191076.

The previous prime is 12191051. The next prime is 12191083. The reversal of 12191077 is 77019121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12173121 + 17956 = 3489^2 + 134^2 .

It is an emirp because it is prime and its reverse (77019121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12191077 - 27 = 12190949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12191087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095538 + 6095539.

It is an arithmetic number, because the mean of its divisors is an integer number (6095539).

Almost surely, 212191077 is an apocalyptic number.

It is an amenable number.

12191077 is a deficient number, since it is larger than the sum of its proper divisors (1).

12191077 is an equidigital number, since it uses as much as digits as its factorization.

12191077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 28.

The square root of 12191077 is about 3491.5722819383. The cubic root of 12191077 is about 230.1516139611.

The spelling of 12191077 in words is "twelve million, one hundred ninety-one thousand, seventy-seven".