863213123 has 2 divisors, whose sum is σ = 863213124. Its totient is φ = 863213122.

The previous prime is 863213081. The next prime is 863213137. The reversal of 863213123 is 321312368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 863213123 - 2¹⁰ = 863212099 is a prime.

It is not a weakly prime, because it can be changed into another prime (863210123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431606561 + 431606562.

It is an arithmetic number, because the mean of its divisors is an integer number (431606562).

Almost surely, 2^863213123 is an apocalyptic number.

863213123 is a deficient number, since it is larger than the sum of its proper divisors (1).

863213123 is an equidigital number, since it uses as much as digits as its factorization.

863213123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 863213123 is about 29380.4888148581. The cubic root of 863213123 is about 952.1514022997.

The spelling of 863213123 in words is "eight hundred sixty-three million, two hundred thirteen thousand, one hundred twenty-three".