136181953 has 2 divisors, whose sum is σ = 136181954. Its totient is φ = 136181952.

The previous prime is 136181933. The next prime is 136181959. The reversal of 136181953 is 359181631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134026929 + 2155024 = 11577^2 + 1468^2 .

It is an emirp because it is prime and its reverse (359181631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136181953 - 2⁵ = 136181921 is a prime.

It is not a weakly prime, because it can be changed into another prime (136181959) 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, 68090976 + 68090977.

It is an arithmetic number, because the mean of its divisors is an integer number (68090977).

Almost surely, 2^136181953 is an apocalyptic number.

It is an amenable number.

136181953 is a deficient number, since it is larger than the sum of its proper divisors (1).

136181953 is an equidigital number, since it uses as much as digits as its factorization.

136181953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 136181953 is about 11669.7023526738. The cubic root of 136181953 is about 514.4855553421.

The spelling of 136181953 in words is "one hundred thirty-six million, one hundred eighty-one thousand, nine hundred fifty-three".