134781673 has 8 divisors (see below), whose sum is σ = 145441800. Its totient is φ = 124163328.

The previous prime is 134781667. The next prime is 134781683. The reversal of 134781673 is 376187431.

It can be written as a sum of positive squares in 4 ways, for example, as 28217344 + 106564329 = 5312^2 + 10323^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 134781673 - 2²¹ = 132684521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134781613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568 + ... + 16801.

It is an arithmetic number, because the mean of its divisors is an integer number (18180225).

Almost surely, 2^134781673 is an apocalyptic number.

134781673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

134781673 is a deficient number, since it is larger than the sum of its proper divisors (10660127).

134781673 is a wasteful number, since it uses less digits than its factorization.

134781673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891.

The product of its digits is 84672, while the sum is 40.

The square root of 134781673 is about 11609.5509387745. The cubic root of 134781673 is about 512.7160911467.

It can be divided in two parts, 13478 and 1673, that added together give a palindrome (15151).

The spelling of 134781673 in words is "one hundred thirty-four million, seven hundred eighty-one thousand, six hundred seventy-three".