135697157 has 2 divisors, whose sum is σ = 135697158. Its totient is φ = 135697156.

The previous prime is 135697153. The next prime is 135697169. The reversal of 135697157 is 751796531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83192641 + 52504516 = 9121^2 + 7246^2 .

It is a cyclic number.

It is not a de Polignac number, because 135697157 - 2² = 135697153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135697153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67848578 + 67848579.

It is an arithmetic number, because the mean of its divisors is an integer number (67848579).

Almost surely, 2^135697157 is an apocalyptic number.

It is an amenable number.

135697157 is a deficient number, since it is larger than the sum of its proper divisors (1).

135697157 is an equidigital number, since it uses as much as digits as its factorization.

135697157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 198450, while the sum is 44.

The square root of 135697157 is about 11648.9122668170. The cubic root of 135697157 is about 513.8743213951.

The spelling of 135697157 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, one hundred fifty-seven".