135955919 has 16 divisors (see below), whose sum is σ = 159045120. Its totient is φ = 114840960.

The previous prime is 135955903. The next prime is 135955943. The reversal of 135955919 is 919559531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 135955919 - 2⁴ = 135955903 is a prime.

It is a super-2 number, since 2×135955919² = 36968023822269122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135955969) 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 in 15 ways as a sum of consecutive naturals, for example, 10172 + ... + 19374.

It is an arithmetic number, because the mean of its divisors is an integer number (9940320).

Almost surely, 2^135955919 is an apocalyptic number.

135955919 is a deficient number, since it is larger than the sum of its proper divisors (23089201).

135955919 is a wasteful number, since it uses less digits than its factorization.

135955919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9310.

The product of its digits is 273375, while the sum is 47.

The square root of 135955919 is about 11660.0136792373. The cubic root of 135955919 is about 514.2007510179.

The spelling of 135955919 in words is "one hundred thirty-five million, nine hundred fifty-five thousand, nine hundred nineteen".