136181771 has 4 divisors (see below), whose sum is σ = 148561944. Its totient is φ = 123801600.

The previous prime is 136181761. The next prime is 136181813. The reversal of 136181771 is 177181631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136181771 - 2¹⁰ = 136180747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136181741) 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 in 3 ways as a sum of consecutive naturals, for example, 6190070 + ... + 6190091.

It is an arithmetic number, because the mean of its divisors is an integer number (37140486).

Almost surely, 2^136181771 is an apocalyptic number.

136181771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136181771 is a deficient number, since it is larger than the sum of its proper divisors (12380173).

136181771 is a wasteful number, since it uses less digits than its factorization.

136181771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12380172.

The product of its digits is 7056, while the sum is 35.

The square root of 136181771 is about 11669.6945547002. The cubic root of 136181771 is about 514.4853261477.

The spelling of 136181771 in words is "one hundred thirty-six million, one hundred eighty-one thousand, seven hundred seventy-one".