789643427 has 2 divisors, whose sum is σ = 789643428. Its totient is φ = 789643426.

The previous prime is 789643399. The next prime is 789643447. The reversal of 789643427 is 724346987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 789643427 - 2¹⁸ = 789381283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (789643447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394821713 + 394821714.

It is an arithmetic number, because the mean of its divisors is an integer number (394821714).

Almost surely, 2^789643427 is an apocalyptic number.

789643427 is a deficient number, since it is larger than the sum of its proper divisors (1).

789643427 is an equidigital number, since it uses as much as digits as its factorization.

789643427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 50.

The square root of 789643427 is about 28100.5947801821. The cubic root of 789643427 is about 924.2944420445.

The spelling of 789643427 in words is "seven hundred eighty-nine million, six hundred forty-three thousand, four hundred twenty-seven".