619623 has 16 divisors (see below), whose sum is σ = 937440. Its totient is φ = 404352.

The previous prime is 619621. The next prime is 619657. The reversal of 619623 is 326916.

It is a happy number.

619623 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 619623 - 2¹ = 619621 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

619623 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (619621) 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 15 ways as a sum of consecutive naturals, for example, 1215 + ... + 1647.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2⁶¹⁹⁶²³ is an apocalyptic number.

619623 is a deficient number, since it is larger than the sum of its proper divisors (317817).

619623 is a wasteful number, since it uses less digits than its factorization.

619623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 489 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 619623 is about 787.1613557588. The cubic root of 619623 is about 85.2529030696.

The spelling of 619623 in words is "six hundred nineteen thousand, six hundred twenty-three".