135404961 has 4 divisors (see below), whose sum is σ = 180539952. Its totient is φ = 90269972.

The previous prime is 135404959. The next prime is 135404977. The reversal of 135404961 is 169404531.

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 135404961 - 2¹ = 135404959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135404911) 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, 22567491 + ... + 22567496.

It is an arithmetic number, because the mean of its divisors is an integer number (45134988).

Almost surely, 2^135404961 is an apocalyptic number.

It is an amenable number.

135404961 is a deficient number, since it is larger than the sum of its proper divisors (45134991).

135404961 is an equidigital number, since it uses as much as digits as its factorization.

135404961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45134990.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 135404961 is about 11636.3637361506. The cubic root of 135404961 is about 513.5052153468.

The spelling of 135404961 in words is "one hundred thirty-five million, four hundred four thousand, nine hundred sixty-one".