427543861 has 2 divisors, whose sum is σ = 427543862. Its totient is φ = 427543860.

The previous prime is 427543799. The next prime is 427543867. The reversal of 427543861 is 168345724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302238225 + 125305636 = 17385^2 + 11194^2 .

It is a cyclic number.

It is not a de Polignac number, because 427543861 - 2⁷ = 427543733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427543867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213771930 + 213771931.

It is an arithmetic number, because the mean of its divisors is an integer number (213771931).

Almost surely, 2^427543861 is an apocalyptic number.

It is an amenable number.

427543861 is a deficient number, since it is larger than the sum of its proper divisors (1).

427543861 is an equidigital number, since it uses as much as digits as its factorization.

427543861 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 427543861 is about 20677.1337713910. The cubic root of 427543861 is about 753.3443896142.

The spelling of 427543861 in words is "four hundred twenty-seven million, five hundred forty-three thousand, eight hundred sixty-one".