427752779 has 4 divisors (see below), whose sum is σ = 432559080. Its totient is φ = 422946480.

The previous prime is 427752769. The next prime is 427752791. The reversal of 427752779 is 977257724.

It is a happy number.

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 427752779 - 2²⁴ = 410975563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427752739) 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, 2403017 + ... + 2403194.

It is an arithmetic number, because the mean of its divisors is an integer number (108139770).

Almost surely, 2^427752779 is an apocalyptic number.

427752779 is a deficient number, since it is larger than the sum of its proper divisors (4806301).

427752779 is an equidigital number, since it uses as much as digits as its factorization.

427752779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806300.

The product of its digits is 1728720, while the sum is 50.

The square root of 427752779 is about 20682.1850634791. The cubic root of 427752779 is about 753.4670761102.

It can be divided in two parts, 42775 and 2779, that added together give a palindrome (45554).

The spelling of 427752779 in words is "four hundred twenty-seven million, seven hundred fifty-two thousand, seven hundred seventy-nine".