784427 has 4 divisors (see below), whose sum is σ = 896496. Its totient is φ = 672360.

The previous prime is 784423. The next prime is 784447. The reversal of 784427 is 724487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 784427 - 2² = 784423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 784393 and 784402.

It is not an unprimeable number, because it can be changed into a prime (784423) 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, 56024 + ... + 56037.

It is an arithmetic number, because the mean of its divisors is an integer number (224124).

2⁷⁸⁴⁴²⁷ is an apocalyptic number.

784427 is a deficient number, since it is larger than the sum of its proper divisors (112069).

784427 is a wasteful number, since it uses less digits than its factorization.

784427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112068.

The product of its digits is 12544, while the sum is 32.

The square root of 784427 is about 885.6788356961. The cubic root of 784427 is about 92.2254630776.

The spelling of 784427 in words is "seven hundred eighty-four thousand, four hundred twenty-seven".