135185957 has 4 divisors (see below), whose sum is σ = 135303360. Its totient is φ = 135068556.

The previous prime is 135185951. The next prime is 135185977. The reversal of 135185957 is 759581531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135185957 - 2¹² = 135181861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135185951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56957 + ... + 59282.

It is an arithmetic number, because the mean of its divisors is an integer number (33825840).

Almost surely, 2^135185957 is an apocalyptic number.

It is an amenable number.

135185957 is a deficient number, since it is larger than the sum of its proper divisors (117403).

135185957 is a wasteful number, since it uses less digits than its factorization.

135185957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117402.

The product of its digits is 189000, while the sum is 44.

The square root of 135185957 is about 11626.9495999596. The cubic root of 135185957 is about 513.2282181558.

The spelling of 135185957 in words is "one hundred thirty-five million, one hundred eighty-five thousand, nine hundred fifty-seven".