620769 has 4 divisors (see below), whose sum is σ = 827696. Its totient is φ = 413844.

The previous prime is 620759. The next prime is 620771. The reversal of 620769 is 967026.

620769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 620769 - 2¹² = 616673 is a prime.

It is a super-2 number, since 2×620769² = 770708302722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103459 + ... + 103464.

It is an arithmetic number, because the mean of its divisors is an integer number (206924).

2⁶²⁰⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

620769 is a deficient number, since it is larger than the sum of its proper divisors (206927).

620769 is a wasteful number, since it uses less digits than its factorization.

620769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206926.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 620769 is about 787.8889515661. Note that the first 3 decimals coincide. The cubic root of 620769 is about 85.3054294480.

The spelling of 620769 in words is "six hundred twenty thousand, seven hundred sixty-nine".