135697957 has 2 divisors, whose sum is σ = 135697958. Its totient is φ = 135697956.

The previous prime is 135697949. The next prime is 135697993. The reversal of 135697957 is 759796531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94750756 + 40947201 = 9734^2 + 6399^2 .

It is a cyclic number.

It is not a de Polignac number, because 135697957 - 2³ = 135697949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135697937) 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, 67848978 + 67848979.

It is an arithmetic number, because the mean of its divisors is an integer number (67848979).

Almost surely, 2^135697957 is an apocalyptic number.

It is an amenable number.

135697957 is a deficient number, since it is larger than the sum of its proper divisors (1).

135697957 is an equidigital number, since it uses as much as digits as its factorization.

135697957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 52.

The square root of 135697957 is about 11648.9466047364. The cubic root of 135697957 is about 513.8753312386.

The spelling of 135697957 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, nine hundred fifty-seven".