134888781 has 16 divisors (see below), whose sum is σ = 186167808. Its totient is φ = 86784000.

The previous prime is 134888759. The next prime is 134888783. The reversal of 134888781 is 187888431.

It is not a de Polignac number, because 134888781 - 2⁷ = 134888653 is a prime.

It is a super-2 number, since 2×134888781² = 36389966479331922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 134888781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134888783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35485 + ... + 39101.

It is an arithmetic number, because the mean of its divisors is an integer number (11635488).

Almost surely, 2^134888781 is an apocalyptic number.

It is an amenable number.

134888781 is a deficient number, since it is larger than the sum of its proper divisors (51279027).

134888781 is a wasteful number, since it uses less digits than its factorization.

134888781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052.

The product of its digits is 344064, while the sum is 48.

The square root of 134888781 is about 11614.1629487450. The cubic root of 134888781 is about 512.8518698804.

The spelling of 134888781 in words is "one hundred thirty-four million, eight hundred eighty-eight thousand, seven hundred eighty-one".