135404491 has 4 divisors (see below), whose sum is σ = 135459000. Its totient is φ = 135349984.

The previous prime is 135404483. The next prime is 135404501. The reversal of 135404491 is 194404531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135404491 - 2³ = 135404483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135404441) 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, 23341 + ... + 28558.

It is an arithmetic number, because the mean of its divisors is an integer number (33864750).

Almost surely, 2^135404491 is an apocalyptic number.

135404491 is a deficient number, since it is larger than the sum of its proper divisors (54509).

135404491 is an equidigital number, since it uses as much as digits as its factorization.

135404491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54508.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 135404491 is about 11636.3435408207. The cubic root of 135404491 is about 513.5046212087.

The spelling of 135404491 in words is "one hundred thirty-five million, four hundred four thousand, four hundred ninety-one".