135931461 has 4 divisors (see below), whose sum is σ = 181241952. Its totient is φ = 90620972.

The previous prime is 135931421. The next prime is 135931493. The reversal of 135931461 is 164139531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 164139531 = 3 ⋅54713177.

It is a cyclic number.

It is not a de Polignac number, because 135931461 - 2¹¹ = 135929413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135931421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22655241 + ... + 22655246.

It is an arithmetic number, because the mean of its divisors is an integer number (45310488).

Almost surely, 2^135931461 is an apocalyptic number.

It is an amenable number.

135931461 is a deficient number, since it is larger than the sum of its proper divisors (45310491).

135931461 is an equidigital number, since it uses as much as digits as its factorization.

135931461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45310490.

The product of its digits is 9720, while the sum is 33.

The square root of 135931461 is about 11658.9648339808. The cubic root of 135931461 is about 514.1699148560.

The spelling of 135931461 in words is "one hundred thirty-five million, nine hundred thirty-one thousand, four hundred sixty-one".