620069 has 4 divisors (see below), whose sum is σ = 621900. Its totient is φ = 618240.

The previous prime is 620051. The next prime is 620099. The reversal of 620069 is 960026.

620069 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 an emirpimes, since its reverse is a distinct semiprime: 960026 = 2 ⋅480013.

It can be written as a sum of positive squares in 2 ways, for example, as 330625 + 289444 = 575^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 620069 - 2⁸ = 619813 is a prime.

It is a super-2 number, since 2×620069² = 768971129522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620029) 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, 242 + ... + 1139.

It is an arithmetic number, because the mean of its divisors is an integer number (155475).

2⁶²⁰⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

620069 is a deficient number, since it is larger than the sum of its proper divisors (1831).

620069 is a wasteful number, since it uses less digits than its factorization.

620069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 620069 is about 787.4446012260. Note that the first 3 decimals coincide. The cubic root of 620069 is about 85.2733529645.

The spelling of 620069 in words is "six hundred twenty thousand, sixty-nine".