134408781 has 32 divisors (see below), whose sum is σ = 215819520. Its totient is φ = 82181952.

The previous prime is 134408761. The next prime is 134408843. The reversal of 134408781 is 187804431.

It is not a de Polignac number, because 134408781 - 2¹⁴ = 134392397 is a prime.

It is a super-2 number, since 2×134408781² = 36131440819811922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134408741) 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 31 ways as a sum of consecutive naturals, for example, 57471 + ... + 59763.

It is an arithmetic number, because the mean of its divisors is an integer number (6744360).

Almost surely, 2^134408781 is an apocalyptic number.

It is an amenable number.

134408781 is a deficient number, since it is larger than the sum of its proper divisors (81410739).

134408781 is a wasteful number, since it uses less digits than its factorization.

134408781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 134408781 is about 11593.4801073707. The cubic root of 134408781 is about 512.2428212735.

The spelling of 134408781 in words is "one hundred thirty-four million, four hundred eight thousand, seven hundred eighty-one".