136500257 has 2 divisors, whose sum is σ = 136500258. Its totient is φ = 136500256.

The previous prime is 136500233. The next prime is 136500263. The reversal of 136500257 is 752005631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 64657681 = 8476^2 + 8041^2 .

It is a cyclic number.

It is not a de Polignac number, because 136500257 - 2¹⁶ = 136434721 is a prime.

It is a super-2 number, since 2×136500257² = 37264640322132098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136500227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68250128 + 68250129.

It is an arithmetic number, because the mean of its divisors is an integer number (68250129).

Almost surely, 2^136500257 is an apocalyptic number.

It is an amenable number.

136500257 is a deficient number, since it is larger than the sum of its proper divisors (1).

136500257 is an equidigital number, since it uses as much as digits as its factorization.

136500257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 136500257 is about 11683.3324441274. The cubic root of 136500257 is about 514.8860865971.

Adding to 136500257 its reverse (752005631), we get a palindrome (888505888).

The spelling of 136500257 in words is "one hundred thirty-six million, five hundred thousand, two hundred fifty-seven".