135718397 has 2 divisors, whose sum is σ = 135718398. Its totient is φ = 135718396.

The previous prime is 135718393. The next prime is 135718409. The reversal of 135718397 is 793817531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87123556 + 48594841 = 9334^2 + 6971^2 .

It is a cyclic number.

It is not a de Polignac number, because 135718397 - 2² = 135718393 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 (135718391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67859198 + 67859199.

It is an arithmetic number, because the mean of its divisors is an integer number (67859199).

Almost surely, 2^135718397 is an apocalyptic number.

It is an amenable number.

135718397 is a deficient number, since it is larger than the sum of its proper divisors (1).

135718397 is an equidigital number, since it uses as much as digits as its factorization.

135718397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 135718397 is about 11649.8239042485. The cubic root of 135718397 is about 513.9011313922.

The spelling of 135718397 in words is "one hundred thirty-five million, seven hundred eighteen thousand, three hundred ninety-seven".