135211913 has 2 divisors, whose sum is σ = 135211914. Its totient is φ = 135211912.

The previous prime is 135211877. The next prime is 135211919. The reversal of 135211913 is 319112531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100260169 + 34951744 = 10013^2 + 5912^2 .

It is a cyclic number.

It is not a de Polignac number, because 135211913 - 2⁶ = 135211849 is a prime.

It is a super-2 number, since 2×135211913² = 36564522834239138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135211919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67605956 + 67605957.

It is an arithmetic number, because the mean of its divisors is an integer number (67605957).

Almost surely, 2^135211913 is an apocalyptic number.

It is an amenable number.

135211913 is a deficient number, since it is larger than the sum of its proper divisors (1).

135211913 is an equidigital number, since it uses as much as digits as its factorization.

135211913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 135211913 is about 11628.0657462882. The cubic root of 135211913 is about 513.2610630347.

The spelling of 135211913 in words is "one hundred thirty-five million, two hundred eleven thousand, nine hundred thirteen".