620929 has 2 divisors, whose sum is σ = 620930. Its totient is φ = 620928.

The previous prime is 620911. The next prime is 620933. The reversal of 620929 is 929026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 497025 + 123904 = 705^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 620929 - 2¹³ = 612737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620897 and 620906.

It is not a weakly prime, because it can be changed into another prime (620909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310464 + 310465.

It is an arithmetic number, because the mean of its divisors is an integer number (310465).

2⁶²⁰⁹²⁹ is an apocalyptic number.

It is an amenable number.

620929 is a deficient number, since it is larger than the sum of its proper divisors (1).

620929 is an equidigital number, since it uses as much as digits as its factorization.

620929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 620929 is about 787.9904821760. The cubic root of 620929 is about 85.3127578295.

The spelling of 620929 in words is "six hundred twenty thousand, nine hundred twenty-nine".