427665427 has 16 divisors (see below), whose sum is σ = 519644160. Its totient is φ = 344009952.

The previous prime is 427665397. The next prime is 427665431. The reversal of 427665427 is 724566724.

It is a cyclic number.

It is not a de Polignac number, because 427665427 - 2¹⁹ = 427141139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (427660427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16527 + ... + 33592.

It is an arithmetic number, because the mean of its divisors is an integer number (32477760).

Almost surely, 2^427665427 is an apocalyptic number.

427665427 is a deficient number, since it is larger than the sum of its proper divisors (91978733).

427665427 is a wasteful number, since it uses less digits than its factorization.

427665427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50202.

The product of its digits is 564480, while the sum is 43.

The square root of 427665427 is about 20680.0731865243. The cubic root of 427665427 is about 753.4157837594.

The spelling of 427665427 in words is "four hundred twenty-seven million, six hundred sixty-five thousand, four hundred twenty-seven".