135691946 has 16 divisors (see below), whose sum is σ = 219386664. Its totient is φ = 62572224.

The previous prime is 135691903. The next prime is 135691949. The reversal of 135691946 is 649196531.

135691946 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 103327225 + 32364721 = 10165^2 + 5689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 135691897 and 135691906.

It is not an unprimeable number, because it can be changed into a prime (135691949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56996 + ... + 59328.

Almost surely, 2^135691946 is an apocalyptic number.

135691946 is a deficient number, since it is larger than the sum of its proper divisors (83694718).

135691946 is a wasteful number, since it uses less digits than its factorization.

135691946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585.

The product of its digits is 174960, while the sum is 44.

The square root of 135691946 is about 11648.6885957175. The cubic root of 135691946 is about 513.8677434303.

The spelling of 135691946 in words is "one hundred thirty-five million, six hundred ninety-one thousand, nine hundred forty-six".