427347881 has 4 divisors (see below), whose sum is σ = 427395012. Its totient is φ = 427300752.

The previous prime is 427347847. The next prime is 427347901. The reversal of 427347881 is 188743724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 271722256 + 155625625 = 16484^2 + 12475^2 .

It is a cyclic number.

It is not a de Polignac number, because 427347881 - 2²⁶ = 360239017 is a prime.

It is a super-2 number, since 2×427347881² = 365252422790380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427347821) 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, 5186 + ... + 29691.

It is an arithmetic number, because the mean of its divisors is an integer number (106848753).

Almost surely, 2^427347881 is an apocalyptic number.

It is an amenable number.

427347881 is a deficient number, since it is larger than the sum of its proper divisors (47131).

427347881 is a wasteful number, since it uses less digits than its factorization.

427347881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47130.

The product of its digits is 301056, while the sum is 44.

The square root of 427347881 is about 20672.3941767759. The cubic root of 427347881 is about 753.2292645854.

The spelling of 427347881 in words is "four hundred twenty-seven million, three hundred forty-seven thousand, eight hundred eighty-one".