134712679921 has 8 divisors (see below), whose sum is σ = 137554843464. Its totient is φ = 131897456640.

The previous prime is 134712679891. The next prime is 134712679939. The reversal of 134712679921 is 129976217431.

It can be written as a sum of positive squares in 4 ways, for example, as 39994000225 + 94718679696 = 199985^2 + 307764^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134712679921 is a prime.

It is a super-2 number, since 2×134712679921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134712679421) 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, 6724960 + ... + 6744961.

It is an arithmetic number, because the mean of its divisors is an integer number (17194355433).

Almost surely, 2^134712679921 is an apocalyptic number.

It is an amenable number.

134712679921 is a deficient number, since it is larger than the sum of its proper divisors (2842163543).

134712679921 is a wasteful number, since it uses less digits than its factorization.

134712679921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13470131.

The product of its digits is 1143072, while the sum is 52.

The spelling of 134712679921 in words is "one hundred thirty-four billion, seven hundred twelve million, six hundred seventy-nine thousand, nine hundred twenty-one".