620399 has 6 divisors (see below), whose sum is σ = 671976. Its totient is φ = 572520.

The previous prime is 620393. The next prime is 620401. The reversal of 620399 is 993026.

It is not a de Polignac number, because 620399 - 2⁴ = 620383 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1667 + ... + 2004.

It is an arithmetic number, because the mean of its divisors is an integer number (111996).

2⁶²⁰³⁹⁹ is an apocalyptic number.

620399 is a deficient number, since it is larger than the sum of its proper divisors (51577).

620399 is a wasteful number, since it uses less digits than its factorization.

620399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697 (or 3684 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 620399 is about 787.6541119045. The cubic root of 620399 is about 85.2884777414.

The spelling of 620399 in words is "six hundred twenty thousand, three hundred ninety-nine".