136271491 has 2 divisors, whose sum is σ = 136271492. Its totient is φ = 136271490.

The previous prime is 136271479. The next prime is 136271539. The reversal of 136271491 is 194172631.

It is a weak prime.

It is an emirp because it is prime and its reverse (194172631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136271491 - 2¹³ = 136263299 is a prime.

It is not a weakly prime, because it can be changed into another prime (136271431) 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, 68135745 + 68135746.

It is an arithmetic number, because the mean of its divisors is an integer number (68135746).

Almost surely, 2^136271491 is an apocalyptic number.

136271491 is a deficient number, since it is larger than the sum of its proper divisors (1).

136271491 is an equidigital number, since it uses as much as digits as its factorization.

136271491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 136271491 is about 11673.5380669273. The cubic root of 136271491 is about 514.5982866655.

The spelling of 136271491 in words is "one hundred thirty-six million, two hundred seventy-one thousand, four hundred ninety-one".