427788929 has 4 divisors (see below), whose sum is σ = 428482884. Its totient is φ = 427094976.

The previous prime is 427788923. The next prime is 427788941. The reversal of 427788929 is 929887724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77088400 + 350700529 = 8780^2 + 18727^2 .

It is a cyclic number.

It is not a de Polignac number, because 427788929 - 2²⁸ = 159353473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (427788923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346052 + ... + 347285.

It is an arithmetic number, because the mean of its divisors is an integer number (107120721).

Almost surely, 2^427788929 is an apocalyptic number.

It is an amenable number.

427788929 is a deficient number, since it is larger than the sum of its proper divisors (693955).

427788929 is an equidigital number, since it uses as much as digits as its factorization.

427788929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693954.

The product of its digits is 4064256, while the sum is 56.

The square root of 427788929 is about 20683.0589855563. The cubic root of 427788929 is about 753.4883010395.

The spelling of 427788929 in words is "four hundred twenty-seven million, seven hundred eighty-eight thousand, nine hundred twenty-nine".