135940697 has 2 divisors, whose sum is σ = 135940698. Its totient is φ = 135940696.

The previous prime is 135940691. The next prime is 135940699. The reversal of 135940697 is 796049531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96452041 + 39488656 = 9821^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 135940697 - 2¹⁰ = 135939673 is a prime.

Together with 135940699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135940691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67970348 + 67970349.

It is an arithmetic number, because the mean of its divisors is an integer number (67970349).

Almost surely, 2^135940697 is an apocalyptic number.

It is an amenable number.

135940697 is a deficient number, since it is larger than the sum of its proper divisors (1).

135940697 is an equidigital number, since it uses as much as digits as its factorization.

135940697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 135940697 is about 11659.3609173059. The cubic root of 135940697 is about 514.1815598565.

The spelling of 135940697 in words is "one hundred thirty-five million, nine hundred forty thousand, six hundred ninety-seven".