619427 has 4 divisors (see below), whose sum is σ = 621720. Its totient is φ = 617136.

The previous prime is 619397. The next prime is 619471. The reversal of 619427 is 724916.

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 619427 - 2⁶ = 619363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 619427.

It is not an unprimeable number, because it can be changed into a prime (619477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677 + ... + 1302.

It is an arithmetic number, because the mean of its divisors is an integer number (155430).

2⁶¹⁹⁴²⁷ is an apocalyptic number.

619427 is a deficient number, since it is larger than the sum of its proper divisors (2293).

619427 is a wasteful number, since it uses less digits than its factorization.

619427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its digits is 3024, while the sum is 29.

The square root of 619427 is about 787.0368479303. The cubic root of 619427 is about 85.2439130164.

The spelling of 619427 in words is "six hundred nineteen thousand, four hundred twenty-seven".