427939 has 2 divisors, whose sum is σ = 427940. Its totient is φ = 427938.

The previous prime is 427919. The next prime is 427949. The reversal of 427939 is 939724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427939 is a prime.

427939 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (427919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213969 + 213970.

It is an arithmetic number, because the mean of its divisors is an integer number (213970).

2⁴²⁷⁹³⁹ is an apocalyptic number.

427939 is a deficient number, since it is larger than the sum of its proper divisors (1).

427939 is an equidigital number, since it uses as much as digits as its factorization.

427939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 427939 is about 654.1704670803. The cubic root of 427939 is about 75.3576400189.

The spelling of 427939 in words is "four hundred twenty-seven thousand, nine hundred thirty-nine".