135891207 has 6 divisors (see below), whose sum is σ = 196287312. Its totient is φ = 90594132.

The previous prime is 135891181. The next prime is 135891227. The reversal of 135891207 is 702198531.

It is not a de Polignac number, because 135891207 - 2¹⁵ = 135858439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135891227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7549503 + ... + 7549520.

It is an arithmetic number, because the mean of its divisors is an integer number (32714552).

Almost surely, 2^135891207 is an apocalyptic number.

135891207 is a deficient number, since it is larger than the sum of its proper divisors (60396105).

135891207 is a wasteful number, since it uses less digits than its factorization.

135891207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15099029 (or 15099026 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 135891207 is about 11657.2383950917. The cubic root of 135891207 is about 514.1191553556.

The spelling of 135891207 in words is "one hundred thirty-five million, eight hundred ninety-one thousand, two hundred seven".