620811619 has 2 divisors, whose sum is σ = 620811620. Its totient is φ = 620811618.

The previous prime is 620811599. The next prime is 620811647. The reversal of 620811619 is 916118026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620811619 - 2¹⁹ = 620287331 is a prime.

It is a super-2 number, since 2×620811619² = 770814132570802322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (620811649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310405809 + 310405810.

It is an arithmetic number, because the mean of its divisors is an integer number (310405810).

Almost surely, 2^620811619 is an apocalyptic number.

620811619 is a deficient number, since it is larger than the sum of its proper divisors (1).

620811619 is an equidigital number, since it uses as much as digits as its factorization.

620811619 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 34.

The square root of 620811619 is about 24916.0915674991. The cubic root of 620811619 is about 853.0738162282.

The spelling of 620811619 in words is "six hundred twenty million, eight hundred eleven thousand, six hundred nineteen".