135517969 has 2 divisors, whose sum is σ = 135517970. Its totient is φ = 135517968.

The previous prime is 135517951. The next prime is 135517973. The reversal of 135517969 is 969715531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106357969 + 29160000 = 10313^2 + 5400^2 .

It is a cyclic number.

It is not a de Polignac number, because 135517969 - 2¹¹ = 135515921 is a prime.

It is a super-2 number, since 2×135517969² = 36730239843769922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135517919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67758984 + 67758985.

It is an arithmetic number, because the mean of its divisors is an integer number (67758985).

Almost surely, 2^135517969 is an apocalyptic number.

It is an amenable number.

135517969 is a deficient number, since it is larger than the sum of its proper divisors (1).

135517969 is an equidigital number, since it uses as much as digits as its factorization.

135517969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 255150, while the sum is 46.

The square root of 135517969 is about 11641.2185358750. The cubic root of 135517969 is about 513.6480315345.

The spelling of 135517969 in words is "one hundred thirty-five million, five hundred seventeen thousand, nine hundred sixty-nine".