812422439 has 2 divisors, whose sum is σ = 812422440. Its totient is φ = 812422438.

The previous prime is 812422417. The next prime is 812422529. The reversal of 812422439 is 934224218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812422439 - 2²⁴ = 795645223 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 812422399 and 812422408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812422139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406211219 + 406211220.

It is an arithmetic number, because the mean of its divisors is an integer number (406211220).

Almost surely, 2^812422439 is an apocalyptic number.

812422439 is a deficient number, since it is larger than the sum of its proper divisors (1).

812422439 is an equidigital number, since it uses as much as digits as its factorization.

812422439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 812422439 is about 28503.0250850677. The cubic root of 812422439 is about 933.0980962289.

The spelling of 812422439 in words is "eight hundred twelve million, four hundred twenty-two thousand, four hundred thirty-nine".