134881491 has 4 divisors (see below), whose sum is σ = 179841992. Its totient is φ = 89920992.

The previous prime is 134881489. The next prime is 134881501. The reversal of 134881491 is 194188431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194188431 = 3 ⋅64729477.

It is not a de Polignac number, because 134881491 - 2¹ = 134881489 is a prime.

It is a super-2 number, since 2×134881491² = 36386033228766162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134881441) 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, 22480246 + ... + 22480251.

It is an arithmetic number, because the mean of its divisors is an integer number (44960498).

Almost surely, 2^134881491 is an apocalyptic number.

134881491 is a deficient number, since it is larger than the sum of its proper divisors (44960501).

134881491 is an equidigital number, since it uses as much as digits as its factorization.

134881491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44960500.

The product of its digits is 27648, while the sum is 39.

The square root of 134881491 is about 11613.8491035487. The cubic root of 134881491 is about 512.8426307689.

The spelling of 134881491 in words is "one hundred thirty-four million, eight hundred eighty-one thousand, four hundred ninety-one".