620919 has 32 divisors (see below), whose sum is σ = 1041600. Its totient is φ = 362880.

The previous prime is 620911. The next prime is 620929. The reversal of 620919 is 919026.

It is a happy number.

It is not a de Polignac number, because 620919 - 2³ = 620911 is a prime.

It is a super-2 number, since 2×620919² = 771080809122, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 620892 and 620901.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620919.

It is not an unprimeable number, because it can be changed into a prime (620911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10149 + ... + 10209.

It is an arithmetic number, because the mean of its divisors is an integer number (32550).

2⁶²⁰⁹¹⁹ is an apocalyptic number.

620919 is a deficient number, since it is larger than the sum of its proper divisors (420681).

620919 is a wasteful number, since it uses less digits than its factorization.

620919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 620919 is about 787.9841368962. The cubic root of 620919 is about 85.3122998425.

The spelling of 620919 in words is "six hundred twenty thousand, nine hundred nineteen".