620779219 has 4 divisors (see below), whose sum is σ = 621259144. Its totient is φ = 620299296.

The previous prime is 620779193. The next prime is 620779253. The reversal of 620779219 is 912977026.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 620779219 - 2¹⁹ = 620254931 is a prime.

It is a super-2 number, since 2×620779219² = 770733677484499922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620749219) 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, 238017 + ... + 240610.

It is an arithmetic number, because the mean of its divisors is an integer number (155314786).

Almost surely, 2^620779219 is an apocalyptic number.

620779219 is a deficient number, since it is larger than the sum of its proper divisors (479925).

620779219 is a wasteful number, since it uses less digits than its factorization.

620779219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479924.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 620779219 is about 24915.4413767848. The cubic root of 620779219 is about 853.0589754018.

The spelling of 620779219 in words is "six hundred twenty million, seven hundred seventy-nine thousand, two hundred nineteen".