134987893 has 2 divisors, whose sum is σ = 134987894. Its totient is φ = 134987892.

The previous prime is 134987863. The next prime is 134987899. The reversal of 134987893 is 398789431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90592324 + 44395569 = 9518^2 + 6663^2 .

It is an emirp because it is prime and its reverse (398789431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134987893 - 2⁵ = 134987861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 134987893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134987899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67493946 + 67493947.

It is an arithmetic number, because the mean of its divisors is an integer number (67493947).

Almost surely, 2^134987893 is an apocalyptic number.

It is an amenable number.

134987893 is a deficient number, since it is larger than the sum of its proper divisors (1).

134987893 is an equidigital number, since it uses as much as digits as its factorization.

134987893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 134987893 is about 11618.4290246143. The cubic root of 134987893 is about 512.9774482269.

The spelling of 134987893 in words is "one hundred thirty-four million, nine hundred eighty-seven thousand, eight hundred ninety-three".