1020001919 has 2 divisors, whose sum is σ = 1020001920. Its totient is φ = 1020001918.

The previous prime is 1020001867. The next prime is 1020001933. The reversal of 1020001919 is 9191000201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1020001919 - 2⁸ = 1020001663 is a prime.

It is a super-2 number, since 2×1020001919² = 2080807829527365122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020001894 and 1020001903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020081919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510000959 + 510000960.

It is an arithmetic number, because the mean of its divisors is an integer number (510000960).

Almost surely, 2^1020001919 is an apocalyptic number.

1020001919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020001919 is an equidigital number, since it uses as much as digits as its factorization.

1020001919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1020001919 is about 31937.4688884389. The cubic root of 1020001919 is about 1006.6233408372.

The spelling of 1020001919 in words is "one billion, twenty million, one thousand, nine hundred nineteen".