427631279 has 4 divisors (see below), whose sum is σ = 427860984. Its totient is φ = 427401576.

The previous prime is 427631263. The next prime is 427631287. The reversal of 427631279 is 972136724.

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 427631279 - 2⁴ = 427631263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427631219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112037 + ... + 115790.

It is an arithmetic number, because the mean of its divisors is an integer number (106965246).

Almost surely, 2^427631279 is an apocalyptic number.

427631279 is a deficient number, since it is larger than the sum of its proper divisors (229705).

427631279 is a wasteful number, since it uses less digits than its factorization.

427631279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229704.

The product of its digits is 127008, while the sum is 41.

The square root of 427631279 is about 20679.2475443378. The cubic root of 427631279 is about 753.3957304457.

Subtracting 427631279 from its reverse (972136724), we obtain a palindrome (544505445).

The spelling of 427631279 in words is "four hundred twenty-seven million, six hundred thirty-one thousand, two hundred seventy-nine".