427435891 has 2 divisors, whose sum is σ = 427435892. Its totient is φ = 427435890.

The previous prime is 427435861. The next prime is 427435909. The reversal of 427435891 is 198534724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427435891 - 2⁵ = 427435859 is a prime.

It is not a weakly prime, because it can be changed into another prime (427435861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213717945 + 213717946.

It is an arithmetic number, because the mean of its divisors is an integer number (213717946).

Almost surely, 2^427435891 is an apocalyptic number.

427435891 is a deficient number, since it is larger than the sum of its proper divisors (1).

427435891 is an equidigital number, since it uses as much as digits as its factorization.

427435891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 427435891 is about 20674.5227514446. The cubic root of 427435891 is about 753.2809688761.

The spelling of 427435891 in words is "four hundred twenty-seven million, four hundred thirty-five thousand, eight hundred ninety-one".