135673520447 has 2 divisors, whose sum is σ = 135673520448. Its totient is φ = 135673520446.

The previous prime is 135673520383. The next prime is 135673520449. The reversal of 135673520447 is 744025376531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135673520447 - 2⁶ = 135673520383 is a prime.

Together with 135673520449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135673520449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67836760223 + 67836760224.

It is an arithmetic number, because the mean of its divisors is an integer number (67836760224).

Almost surely, 2^135673520447 is an apocalyptic number.

135673520447 is a deficient number, since it is larger than the sum of its proper divisors (1).

135673520447 is an equidigital number, since it uses as much as digits as its factorization.

135673520447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 47.

Adding to 135673520447 its reverse (744025376531), we get a palindrome (879698896978).

The spelling of 135673520447 in words is "one hundred thirty-five billion, six hundred seventy-three million, five hundred twenty thousand, four hundred forty-seven".