619823 has 4 divisors (see below), whose sum is σ = 622128. Its totient is φ = 617520.

The previous prime is 619819. The next prime is 619831. The reversal of 619823 is 328916.

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 619823 - 2² = 619819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619813) 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, 686 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (155532).

2⁶¹⁹⁸²³ is an apocalyptic number.

619823 is a deficient number, since it is larger than the sum of its proper divisors (2305).

619823 is a wasteful number, since it uses less digits than its factorization.

619823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304.

The product of its digits is 2592, while the sum is 29.

The square root of 619823 is about 787.2883842659. The cubic root of 619823 is about 85.2620746392.

The spelling of 619823 in words is "six hundred nineteen thousand, eight hundred twenty-three".