136223137 has 2 divisors, whose sum is σ = 136223138. Its totient is φ = 136223136.

The previous prime is 136223123. The next prime is 136223147. The reversal of 136223137 is 731322631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88943761 + 47279376 = 9431^2 + 6876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136223137 is a prime.

It is equal to p_7710634 and since 136223137 and 7710634 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (136223147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68111568 + 68111569.

It is an arithmetic number, because the mean of its divisors is an integer number (68111569).

Almost surely, 2^136223137 is an apocalyptic number.

It is an amenable number.

136223137 is a deficient number, since it is larger than the sum of its proper divisors (1).

136223137 is an equidigital number, since it uses as much as digits as its factorization.

136223137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 28.

The square root of 136223137 is about 11671.4667887117. The cubic root of 136223137 is about 514.5374135045.

Adding to 136223137 its reverse (731322631), we get a palindrome (867545768).

The spelling of 136223137 in words is "one hundred thirty-six million, two hundred twenty-three thousand, one hundred thirty-seven".