135961069 has 2 divisors, whose sum is σ = 135961070. Its totient is φ = 135961068.

The previous prime is 135961057. The next prime is 135961099. The reversal of 135961069 is 960169531.

135961069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100701225 + 35259844 = 10035^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 135961069 - 2¹⁵ = 135928301 is a prime.

It is a super-2 number, since 2×135961069² = 36970824567245522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135961039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67980534 + 67980535.

It is an arithmetic number, because the mean of its divisors is an integer number (67980535).

Almost surely, 2^135961069 is an apocalyptic number.

It is an amenable number.

135961069 is a deficient number, since it is larger than the sum of its proper divisors (1).

135961069 is an equidigital number, since it uses as much as digits as its factorization.

135961069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 135961069 is about 11660.2345173671. The cubic root of 135961069 is about 514.2072435646.

The spelling of 135961069 in words is "one hundred thirty-five million, nine hundred sixty-one thousand, sixty-nine".