427721627 has 2 divisors, whose sum is σ = 427721628. Its totient is φ = 427721626.

The previous prime is 427721603. The next prime is 427721641. The reversal of 427721627 is 726127724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427721627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (427721677) 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, 213860813 + 213860814.

It is an arithmetic number, because the mean of its divisors is an integer number (213860814).

Almost surely, 2^427721627 is an apocalyptic number.

427721627 is a deficient number, since it is larger than the sum of its proper divisors (1).

427721627 is an equidigital number, since it uses as much as digits as its factorization.

427721627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65856, while the sum is 38.

The square root of 427721627 is about 20681.4319378519. The cubic root of 427721627 is about 753.4487847221.

The spelling of 427721627 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, six hundred twenty-seven".