855131293 has 2 divisors, whose sum is σ = 855131294. Its totient is φ = 855131292.

The previous prime is 855131273. The next prime is 855131327. The reversal of 855131293 is 392131558.

It is a happy number.

855131293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721567044 + 133564249 = 26862^2 + 11557^2 .

It is a cyclic number.

It is not a de Polignac number, because 855131293 - 2⁹ = 855130781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855131213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427565646 + 427565647.

It is an arithmetic number, because the mean of its divisors is an integer number (427565647).

Almost surely, 2^855131293 is an apocalyptic number.

It is an amenable number.

855131293 is a deficient number, since it is larger than the sum of its proper divisors (1).

855131293 is an equidigital number, since it uses as much as digits as its factorization.

855131293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 855131293 is about 29242.6280111757. The cubic root of 855131293 is about 949.1705754116.

The spelling of 855131293 in words is "eight hundred fifty-five million, one hundred thirty-one thousand, two hundred ninety-three".