620671619 has 2 divisors, whose sum is σ = 620671620. Its totient is φ = 620671618.

The previous prime is 620671607. The next prime is 620671621. The reversal of 620671619 is 916176026.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620671619 - 2⁴ = 620671603 is a prime.

It is a super-2 number, since 2×620671619² = 770466517264162322, which contains 22 as substring.

Together with 620671621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620671019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310335809 + 310335810.

It is an arithmetic number, because the mean of its divisors is an integer number (310335810).

Almost surely, 2^620671619 is an apocalyptic number.

620671619 is a deficient number, since it is larger than the sum of its proper divisors (1).

620671619 is an equidigital number, since it uses as much as digits as its factorization.

620671619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 620671619 is about 24913.2819796991. The cubic root of 620671619 is about 853.0096854950.

The spelling of 620671619 in words is "six hundred twenty million, six hundred seventy-one thousand, six hundred nineteen".