136443971 has 2 divisors, whose sum is σ = 136443972. Its totient is φ = 136443970.

The previous prime is 136443913. The next prime is 136443977. The reversal of 136443971 is 179344631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136443971 - 2⁶ = 136443907 is a prime.

It is not a weakly prime, because it can be changed into another prime (136443977) 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, 68221985 + 68221986.

It is an arithmetic number, because the mean of its divisors is an integer number (68221986).

Almost surely, 2^136443971 is an apocalyptic number.

136443971 is a deficient number, since it is larger than the sum of its proper divisors (1).

136443971 is an equidigital number, since it uses as much as digits as its factorization.

136443971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 136443971 is about 11680.9233795963. The cubic root of 136443971 is about 514.8153056251.

The spelling of 136443971 in words is "one hundred thirty-six million, four hundred forty-three thousand, nine hundred seventy-one".