135697511 has 2 divisors, whose sum is σ = 135697512. Its totient is φ = 135697510.

The previous prime is 135697469. The next prime is 135697517. The reversal of 135697511 is 115796531.

It is a strong prime.

It is an emirp because it is prime and its reverse (115796531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135697511 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135697517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67848755 + 67848756.

It is an arithmetic number, because the mean of its divisors is an integer number (67848756).

Almost surely, 2^135697511 is an apocalyptic number.

135697511 is a deficient number, since it is larger than the sum of its proper divisors (1).

135697511 is an equidigital number, since it uses as much as digits as its factorization.

135697511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 38.

The square root of 135697511 is about 11648.9274613588. The cubic root of 135697511 is about 513.8747682513.

The spelling of 135697511 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, five hundred eleven".