427891289 has 8 divisors (see below), whose sum is σ = 491502528. Its totient is φ = 364901040.

The previous prime is 427891283. The next prime is 427891307. The reversal of 427891289 is 982198724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427891289 - 2²⁴ = 411114073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427891283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153767 + ... + 156524.

It is an arithmetic number, because the mean of its divisors is an integer number (61437816).

Almost surely, 2^427891289 is an apocalyptic number.

It is an amenable number.

427891289 is a deficient number, since it is larger than the sum of its proper divisors (63611239).

427891289 is a wasteful number, since it uses less digits than its factorization.

427891289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310495.

The product of its digits is 580608, while the sum is 50.

The square root of 427891289 is about 20685.5333264579. The cubic root of 427891289 is about 753.5483936900.

The spelling of 427891289 in words is "four hundred twenty-seven million, eight hundred ninety-one thousand, two hundred eighty-nine".