427435861 has 2 divisors, whose sum is σ = 427435862. Its totient is φ = 427435860.

The previous prime is 427435859. The next prime is 427435891. The reversal of 427435861 is 168534724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344807761 + 82628100 = 18569^2 + 9090^2 .

It is a cyclic number.

It is not a de Polignac number, because 427435861 - 2¹ = 427435859 is a prime.

It is a super-2 number, since 2×427435861² = 365402830537622642, which contains 22 as substring.

Together with 427435859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427435891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213717930 + 213717931.

It is an arithmetic number, because the mean of its divisors is an integer number (213717931).

Almost surely, 2^427435861 is an apocalyptic number.

It is an amenable number.

427435861 is a deficient number, since it is larger than the sum of its proper divisors (1).

427435861 is an equidigital number, since it uses as much as digits as its factorization.

427435861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 427435861 is about 20674.5220259139. The cubic root of 427435861 is about 753.2809512529.

The spelling of 427435861 in words is "four hundred twenty-seven million, four hundred thirty-five thousand, eight hundred sixty-one".