134640407 has 4 divisors (see below), whose sum is σ = 146880456. Its totient is φ = 122400360.

The previous prime is 134640379. The next prime is 134640421. The reversal of 134640407 is 704046431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 134640407 - 2⁶ = 134640343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 134640407.

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 3 ways as a sum of consecutive naturals, for example, 6120008 + ... + 6120029.

It is an arithmetic number, because the mean of its divisors is an integer number (36720114).

Almost surely, 2^134640407 is an apocalyptic number.

134640407 is a deficient number, since it is larger than the sum of its proper divisors (12240049).

134640407 is a wasteful number, since it uses less digits than its factorization.

134640407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240048.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 134640407 is about 11603.4653013658. The cubic root of 134640407 is about 512.5369009321.

Adding to 134640407 its reverse (704046431), we get a palindrome (838686838).

The spelling of 134640407 in words is "one hundred thirty-four million, six hundred forty thousand, four hundred seven".