427665329 has 8 divisors (see below), whose sum is σ = 526357440. Its totient is φ = 338372496.

The previous prime is 427665323. The next prime is 427665341. The reversal of 427665329 is 923566724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427665329 - 2²⁰ = 426616753 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 427665329.

It is not an unprimeable number, because it can be changed into a prime (427665323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349719 + ... + 2349900.

It is an arithmetic number, because the mean of its divisors is an integer number (65794680).

Almost surely, 2^427665329 is an apocalyptic number.

It is an amenable number.

427665329 is a deficient number, since it is larger than the sum of its proper divisors (98692111).

427665329 is a wasteful number, since it uses less digits than its factorization.

427665329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4699639.

The product of its digits is 544320, while the sum is 44.

The square root of 427665329 is about 20680.0708170934. The cubic root of 427665329 is about 753.4157262107.

The spelling of 427665329 in words is "four hundred twenty-seven million, six hundred sixty-five thousand, three hundred twenty-nine".