620869 has 2 divisors, whose sum is σ = 620870. Its totient is φ = 620868.

The previous prime is 620849. The next prime is 620887. The reversal of 620869 is 968026.

620869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429025 + 191844 = 655^2 + 438^2 .

It is a cyclic number.

It is not a de Polignac number, because 620869 - 2¹⁹ = 96581 is a prime.

It is a super-2 number, since 2×620869² = 770956630322, which contains 22 as substring.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 620869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310434 + 310435.

It is an arithmetic number, because the mean of its divisors is an integer number (310435).

2⁶²⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

620869 is a deficient number, since it is larger than the sum of its proper divisors (1).

620869 is an equidigital number, since it uses as much as digits as its factorization.

620869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 620869 is about 787.9524097304. The cubic root of 620869 is about 85.3100098340.

The spelling of 620869 in words is "six hundred twenty thousand, eight hundred sixty-nine".