863942279 has 2 divisors, whose sum is σ = 863942280. Its totient is φ = 863942278.

The previous prime is 863942273. The next prime is 863942333. The reversal of 863942279 is 972249368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863942279 - 2⁴ = 863942263 is a prime.

It is a super-2 number, since 2×863942279² = 1492792522887427682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863942273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431971139 + 431971140.

It is an arithmetic number, because the mean of its divisors is an integer number (431971140).

Almost surely, 2^863942279 is an apocalyptic number.

863942279 is a deficient number, since it is larger than the sum of its proper divisors (1).

863942279 is an equidigital number, since it uses as much as digits as its factorization.

863942279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 863942279 is about 29392.8950428501. The cubic root of 863942279 is about 952.4194208993.

The spelling of 863942279 in words is "eight hundred sixty-three million, nine hundred forty-two thousand, two hundred seventy-nine".