427722871 has 2 divisors, whose sum is σ = 427722872. Its totient is φ = 427722870.

The previous prime is 427722853. The next prime is 427722899. The reversal of 427722871 is 178227724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427722871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427722811) 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, 213861435 + 213861436.

It is an arithmetic number, because the mean of its divisors is an integer number (213861436).

Almost surely, 2^427722871 is an apocalyptic number.

427722871 is a deficient number, since it is larger than the sum of its proper divisors (1).

427722871 is an equidigital number, since it uses as much as digits as its factorization.

427722871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 40.

The square root of 427722871 is about 20681.4620131170. The cubic root of 427722871 is about 753.4495151734.

The spelling of 427722871 in words is "four hundred twenty-seven million, seven hundred twenty-two thousand, eight hundred seventy-one".