136648973 has 2 divisors, whose sum is σ = 136648974. Its totient is φ = 136648972.

The previous prime is 136648937. The next prime is 136648987. The reversal of 136648973 is 379846631.

It is a happy number.

Together with previous prime (136648937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125372809 + 11276164 = 11197^2 + 3358^2 .

It is a cyclic number.

It is not a de Polignac number, because 136648973 - 2⁸ = 136648717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136648903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68324486 + 68324487.

It is an arithmetic number, because the mean of its divisors is an integer number (68324487).

Almost surely, 2^136648973 is an apocalyptic number.

It is an amenable number.

136648973 is a deficient number, since it is larger than the sum of its proper divisors (1).

136648973 is an equidigital number, since it uses as much as digits as its factorization.

136648973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The square root of 136648973 is about 11689.6951628347. The cubic root of 136648973 is about 515.0730068995.

The spelling of 136648973 in words is "one hundred thirty-six million, six hundred forty-eight thousand, nine hundred seventy-three".