1020386819 has 2 divisors, whose sum is σ = 1020386820. Its totient is φ = 1020386818.

The previous prime is 1020386753. The next prime is 1020386821. The reversal of 1020386819 is 9186830201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020386819 is a prime.

It is a super-2 number, since 2×1020386819² = 2082378520777877522, which contains 22 as substring.

Together with 1020386821, 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 (1020386119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510193409 + 510193410.

It is an arithmetic number, because the mean of its divisors is an integer number (510193410).

Almost surely, 2^1020386819 is an apocalyptic number.

1020386819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020386819 is an equidigital number, since it uses as much as digits as its factorization.

1020386819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1020386819 is about 31943.4941576528. The cubic root of 1020386819 is about 1006.7499421020.

The spelling of 1020386819 in words is "one billion, twenty million, three hundred eighty-six thousand, eight hundred nineteen".