427772779 has 4 divisors (see below), whose sum is σ = 488883184. Its totient is φ = 366662376.

The previous prime is 427772767. The next prime is 427772827. The reversal of 427772779 is 977277724.

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

It is a cyclic number.

It is not a de Polignac number, because 427772779 - 2⁵ = 427772747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427772179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30555192 + ... + 30555205.

It is an arithmetic number, because the mean of its divisors is an integer number (122220796).

Almost surely, 2^427772779 is an apocalyptic number.

427772779 is a deficient number, since it is larger than the sum of its proper divisors (61110405).

427772779 is an equidigital number, since it uses as much as digits as its factorization.

427772779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61110404.

The product of its digits is 2420208, while the sum is 52.

The square root of 427772779 is about 20682.6685657340. The cubic root of 427772779 is about 753.4788189574.

The spelling of 427772779 in words is "four hundred twenty-seven million, seven hundred seventy-two thousand, seven hundred seventy-nine".