136503023 has 2 divisors, whose sum is σ = 136503024. Its totient is φ = 136503022.

The previous prime is 136502963. The next prime is 136503043. The reversal of 136503023 is 320305631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136503023 - 2¹⁸ = 136240879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136503023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136503043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68251511 + 68251512.

It is an arithmetic number, because the mean of its divisors is an integer number (68251512).

Almost surely, 2^136503023 is an apocalyptic number.

136503023 is a deficient number, since it is larger than the sum of its proper divisors (1).

136503023 is an equidigital number, since it uses as much as digits as its factorization.

136503023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 136503023 is about 11683.4508172885. The cubic root of 136503023 is about 514.8895644057.

Adding to 136503023 its reverse (320305631), we get a palindrome (456808654).

The spelling of 136503023 in words is "one hundred thirty-six million, five hundred three thousand, twenty-three".