134878123213 has 2 divisors, whose sum is σ = 134878123214. Its totient is φ = 134878123212.

The previous prime is 134878123013. The next prime is 134878123253. The reversal of 134878123213 is 312321878431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93001821444 + 41876301769 = 304962^2 + 204637^2 .

It is a cyclic number.

It is not a de Polignac number, because 134878123213 - 2¹⁷ = 134877992141 is a prime.

It is a super-2 number, since 2×134878123213² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 134878123213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134878123253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67439061606 + 67439061607.

It is an arithmetic number, because the mean of its divisors is an integer number (67439061607).

Almost surely, 2^134878123213 is an apocalyptic number.

It is an amenable number.

134878123213 is a deficient number, since it is larger than the sum of its proper divisors (1).

134878123213 is an equidigital number, since it uses as much as digits as its factorization.

134878123213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The spelling of 134878123213 in words is "one hundred thirty-four billion, eight hundred seventy-eight million, one hundred twenty-three thousand, two hundred thirteen".