134640447 has 16 divisors (see below), whose sum is σ = 185843712. Its totient is φ = 86637600.

The previous prime is 134640427. The next prime is 134640497. The reversal of 134640447 is 744046431.

134640447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 134640447 - 2¹² = 134636351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134640427) 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, 9322 + ... + 18872.

It is an arithmetic number, because the mean of its divisors is an integer number (11615232).

Almost surely, 2^134640447 is an apocalyptic number.

134640447 is a deficient number, since it is larger than the sum of its proper divisors (51203265).

134640447 is a wasteful number, since it uses less digits than its factorization.

134640447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9718.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 134640447 is about 11603.4670249887. The cubic root of 134640447 is about 512.5369516883.

Adding to 134640447 its reverse (744046431), we get a palindrome (878686878).

The spelling of 134640447 in words is "one hundred thirty-four million, six hundred forty thousand, four hundred forty-seven".