619855 has 8 divisors (see below), whose sum is σ = 749664. Its totient is φ = 492000.

The previous prime is 619849. The next prime is 619867. The reversal of 619855 is 558916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 619855 - 2¹⁵ = 587087 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 619855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (93708).

2⁶¹⁹⁸⁵⁵ is an apocalyptic number.

619855 is a deficient number, since it is larger than the sum of its proper divisors (129809).

619855 is a wasteful number, since it uses less digits than its factorization.

619855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its digits is 10800, while the sum is 34.

The square root of 619855 is about 787.3087069251. The cubic root of 619855 is about 85.2635419073.

The spelling of 619855 in words is "six hundred nineteen thousand, eight hundred fifty-five".