136478497 has 2 divisors, whose sum is σ = 136478498. Its totient is φ = 136478496.

The previous prime is 136478491. The next prime is 136478509. The reversal of 136478497 is 794874631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136212241 + 266256 = 11671^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 136478497 - 2⁷ = 136478369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136478497.

It is not a weakly prime, because it can be changed into another prime (136478491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68239248 + 68239249.

It is an arithmetic number, because the mean of its divisors is an integer number (68239249).

Almost surely, 2^136478497 is an apocalyptic number.

It is an amenable number.

136478497 is a deficient number, since it is larger than the sum of its proper divisors (1).

136478497 is an equidigital number, since it uses as much as digits as its factorization.

136478497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 136478497 is about 11682.4011658563. The cubic root of 136478497 is about 514.8587251916.

The spelling of 136478497 in words is "one hundred thirty-six million, four hundred seventy-eight thousand, four hundred ninety-seven".