135208407 has 4 divisors (see below), whose sum is σ = 180277880. Its totient is φ = 90138936.

The previous prime is 135208399. The next prime is 135208417. The reversal of 135208407 is 704802531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704802531 = 3 ⋅234934177.

It is not a de Polignac number, because 135208407 - 2³ = 135208399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135208417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22534732 + ... + 22534737.

It is an arithmetic number, because the mean of its divisors is an integer number (45069470).

Almost surely, 2^135208407 is an apocalyptic number.

135208407 is a deficient number, since it is larger than the sum of its proper divisors (45069473).

135208407 is an equidigital number, since it uses as much as digits as its factorization.

135208407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45069472.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 135208407 is about 11627.9149893693. The cubic root of 135208407 is about 513.2566267667.

The spelling of 135208407 in words is "one hundred thirty-five million, two hundred eight thousand, four hundred seven".