619228979 has 2 divisors, whose sum is σ = 619228980. Its totient is φ = 619228978.

The previous prime is 619228969. The next prime is 619228991. The reversal of 619228979 is 979822916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 619228979 - 2⁴ = 619228963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 619228979.

It is not a weakly prime, because it can be changed into another prime (619228919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309614489 + 309614490.

It is an arithmetic number, because the mean of its divisors is an integer number (309614490).

Almost surely, 2^619228979 is an apocalyptic number.

619228979 is a deficient number, since it is larger than the sum of its proper divisors (1).

619228979 is an equidigital number, since it uses as much as digits as its factorization.

619228979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 619228979 is about 24884.3119052949. The cubic root of 619228979 is about 852.3482833871.

The spelling of 619228979 in words is "six hundred nineteen million, two hundred twenty-eight thousand, nine hundred seventy-nine".