135897947 has 2 divisors, whose sum is σ = 135897948. Its totient is φ = 135897946.

The previous prime is 135897919. The next prime is 135897953. The reversal of 135897947 is 749798531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135897947 - 2¹⁰ = 135896923 is a prime.

It is not a weakly prime, because it can be changed into another prime (135897907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67948973 + 67948974.

It is an arithmetic number, because the mean of its divisors is an integer number (67948974).

Almost surely, 2^135897947 is an apocalyptic number.

135897947 is a deficient number, since it is larger than the sum of its proper divisors (1).

135897947 is an equidigital number, since it uses as much as digits as its factorization.

135897947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 53.

The square root of 135897947 is about 11657.5274822751. The cubic root of 135897947 is about 514.1276550614.

The spelling of 135897947 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, nine hundred forty-seven".