1002019091 has 2 divisors, whose sum is σ = 1002019092. Its totient is φ = 1002019090.

The previous prime is 1002019079. The next prime is 1002019133. The reversal of 1002019091 is 1909102001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002019091 - 2²² = 997824787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002019391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501009545 + 501009546.

It is an arithmetic number, because the mean of its divisors is an integer number (501009546).

Almost surely, 2^1002019091 is an apocalyptic number.

1002019091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002019091 is an equidigital number, since it uses as much as digits as its factorization.

1002019091 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 1002019091 is about 31654.6851350633. The cubic root of 1002019091 is about 1000.6725778709.

The spelling of 1002019091 in words is "one billion, two million, nineteen thousand, ninety-one".