134613781 has 8 divisors (see below), whose sum is σ = 137675520. Its totient is φ = 131560368.

The previous prime is 134613707. The next prime is 134613793. The reversal of 134613781 is 187316431.

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 134613781 - 2¹⁷ = 134482709 is a prime.

It is a super-2 number, since 2×134613781² = 36241740070231922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134619781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40075 + ... + 43303.

It is an arithmetic number, because the mean of its divisors is an integer number (17209440).

Almost surely, 2^134613781 is an apocalyptic number.

It is an amenable number.

134613781 is a deficient number, since it is larger than the sum of its proper divisors (3061739).

134613781 is an equidigital number, since it uses as much as digits as its factorization.

134613781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163.

The product of its digits is 12096, while the sum is 34.

The square root of 134613781 is about 11602.3179149685. The cubic root of 134613781 is about 512.5031128901.

The spelling of 134613781 in words is "one hundred thirty-four million, six hundred thirteen thousand, seven hundred eighty-one".