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12729491 is a prime number
BaseRepresentation
bin110000100011…
…110010010011
3212221201120122
4300203302103
511224320431
61132500455
7213125135
oct60436223
925851518
1012729491
117204945
12431a72b
132839058
141995055
1511b6a7b
hexc23c93

12729491 has 2 divisors, whose sum is σ = 12729492. Its totient is φ = 12729490.

The previous prime is 12729439. The next prime is 12729503. The reversal of 12729491 is 19492721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12729491 is a prime.

It is a super-2 number, since 2×127294912 = 324079882238162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12729091) 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, 6364745 + 6364746.

It is an arithmetic number, because the mean of its divisors is an integer number (6364746).

Almost surely, 212729491 is an apocalyptic number.

12729491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12729491 is an equidigital number, since it uses as much as digits as its factorization.

12729491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 12729491 is about 3567.8412240457. The cubic root of 12729491 is about 233.4911080315.

The spelling of 12729491 in words is "twelve million, seven hundred twenty-nine thousand, four hundred ninety-one".