840134093 has 2 divisors, whose sum is σ = 840134094. Its totient is φ = 840134092.

The previous prime is 840133913. The next prime is 840134117. The reversal of 840134093 is 390431048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516062089 + 324072004 = 22717^2 + 18002^2 .

It is a cyclic number.

It is not a de Polignac number, because 840134093 - 2¹⁰ = 840133069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840124093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420067046 + 420067047.

It is an arithmetic number, because the mean of its divisors is an integer number (420067047).

Almost surely, 2^840134093 is an apocalyptic number.

It is an amenable number.

840134093 is a deficient number, since it is larger than the sum of its proper divisors (1).

840134093 is an equidigital number, since it uses as much as digits as its factorization.

840134093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 840134093 is about 28985.0667240909. The cubic root of 840134093 is about 943.5890005141.

The spelling of 840134093 in words is "eight hundred forty million, one hundred thirty-four thousand, ninety-three".