619997801 has 2 divisors, whose sum is σ = 619997802. Its totient is φ = 619997800.

The previous prime is 619997771. The next prime is 619997827. The reversal of 619997801 is 108799916.

619997801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340439401 + 279558400 = 18451^2 + 16720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-619997801 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 619997801.

It is not a weakly prime, because it can be changed into another prime (619997101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309998900 + 309998901.

It is an arithmetic number, because the mean of its divisors is an integer number (309998901).

Almost surely, 2^619997801 is an apocalyptic number.

It is an amenable number.

619997801 is a deficient number, since it is larger than the sum of its proper divisors (1).

619997801 is an equidigital number, since it uses as much as digits as its factorization.

619997801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 50.

The square root of 619997801 is about 24899.7550389557. The cubic root of 619997801 is about 852.7008902133.

The spelling of 619997801 in words is "six hundred nineteen million, nine hundred ninety-seven thousand, eight hundred one".