427819 has 6 divisors (see below), whose sum is σ = 497724. Its totient is φ = 366660.

The previous prime is 427813. The next prime is 427849. The reversal of 427819 is 918724.

It is not a de Polignac number, because 427819 - 2⁵ = 427787 is a prime.

It is a super-2 number, since 2×427819² = 366058193522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4317 + ... + 4414.

It is an arithmetic number, because the mean of its divisors is an integer number (82954).

2⁴²⁷⁸¹⁹ is an apocalyptic number.

427819 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

427819 is a deficient number, since it is larger than the sum of its proper divisors (69905).

427819 is an equidigital number, since it uses as much as digits as its factorization.

427819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8745 (or 8738 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 427819 is about 654.0787414371. The cubic root of 427819 is about 75.3505955864.

The spelling of 427819 in words is "four hundred twenty-seven thousand, eight hundred nineteen".