427681273 has 4 divisors (see below), whose sum is σ = 433095040. Its totient is φ = 422267508.

The previous prime is 427681271. The next prime is 427681313. The reversal of 427681273 is 372186724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 427681273 - 2¹ = 427681271 is a prime.

It is a super-2 number, since 2×427681273² = 365822542549801058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427681271) 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, 2706765 + ... + 2706922.

It is an arithmetic number, because the mean of its divisors is an integer number (108273760).

Almost surely, 2^427681273 is an apocalyptic number.

It is an amenable number.

427681273 is a deficient number, since it is larger than the sum of its proper divisors (5413767).

427681273 is an equidigital number, since it uses as much as digits as its factorization.

427681273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5413766.

The product of its digits is 112896, while the sum is 40.

The square root of 427681273 is about 20680.4563054107. The cubic root of 427681273 is about 753.4250889143.

The spelling of 427681273 in words is "four hundred twenty-seven million, six hundred eighty-one thousand, two hundred seventy-three".