134206781 has 8 divisors (see below), whose sum is σ = 138851328. Its totient is φ = 129582000.

The previous prime is 134206753. The next prime is 134206799. The reversal of 134206781 is 187602431.

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 134206781 - 2²⁶ = 67097917 is a prime.

It is a super-2 number, since 2×134206781² = 36022920132763922, 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 (134206181) 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, 9596 + ... + 18986.

It is an arithmetic number, because the mean of its divisors is an integer number (17356416).

Almost surely, 2^134206781 is an apocalyptic number.

It is an amenable number.

134206781 is a deficient number, since it is larger than the sum of its proper divisors (4644547).

134206781 is an equidigital number, since it uses as much as digits as its factorization.

134206781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 134206781 is about 11584.7650386186. The cubic root of 134206781 is about 511.9860797912.

The spelling of 134206781 in words is "one hundred thirty-four million, two hundred six thousand, seven hundred eighty-one".