135331491 has 8 divisors (see below), whose sum is σ = 183135424. Its totient is φ = 88874280.

The previous prime is 135331453. The next prime is 135331501. The reversal of 135331491 is 194133531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135331491 - 2¹¹ = 135329443 is a prime.

It is a super-2 number, since 2×135331491² = 36629224912566162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135331411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336445 + ... + 336846.

It is an arithmetic number, because the mean of its divisors is an integer number (22891928).

Almost surely, 2^135331491 is an apocalyptic number.

135331491 is a deficient number, since it is larger than the sum of its proper divisors (47803933).

135331491 is an equidigital number, since it uses as much as digits as its factorization.

135331491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673361.

The product of its digits is 4860, while the sum is 30.

The square root of 135331491 is about 11633.2063937678. The cubic root of 135331491 is about 513.4123234924.

The spelling of 135331491 in words is "one hundred thirty-five million, three hundred thirty-one thousand, four hundred ninety-one".