135091399 has 2 divisors, whose sum is σ = 135091400. Its totient is φ = 135091398.

The previous prime is 135091373. The next prime is 135091441. The reversal of 135091399 is 993190531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135091399 - 2⁹ = 135090887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135091339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67545699 + 67545700.

It is an arithmetic number, because the mean of its divisors is an integer number (67545700).

Almost surely, 2^135091399 is an apocalyptic number.

135091399 is a deficient number, since it is larger than the sum of its proper divisors (1).

135091399 is an equidigital number, since it uses as much as digits as its factorization.

135091399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 135091399 is about 11622.8825598472. The cubic root of 135091399 is about 513.1085283243.

The spelling of 135091399 in words is "one hundred thirty-five million, ninety-one thousand, three hundred ninety-nine".