135899807 has 2 divisors, whose sum is σ = 135899808. Its totient is φ = 135899806.

The previous prime is 135899773. The next prime is 135899831. The reversal of 135899807 is 708998531.

135899807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135899807 - 2⁸ = 135899551 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135899867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67949903 + 67949904.

It is an arithmetic number, because the mean of its divisors is an integer number (67949904).

Almost surely, 2^135899807 is an apocalyptic number.

135899807 is a deficient number, since it is larger than the sum of its proper divisors (1).

135899807 is an equidigital number, since it uses as much as digits as its factorization.

135899807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 135899807 is about 11657.6072587817. The cubic root of 135899807 is about 514.1300006280.

The spelling of 135899807 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, eight hundred seven".