1001009899 has 2 divisors, whose sum is σ = 1001009900. Its totient is φ = 1001009898.

The previous prime is 1001009879. The next prime is 1001009923. The reversal of 1001009899 is 9989001001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001009899 - 2¹³ = 1001001707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001009819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500504949 + 500504950.

It is an arithmetic number, because the mean of its divisors is an integer number (500504950).

Almost surely, 2^1001009899 is an apocalyptic number.

1001009899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001009899 is an equidigital number, since it uses as much as digits as its factorization.

1001009899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1001009899 is about 31638.7404774590. The cubic root of 1001009899 is about 1000.3365197418.

The spelling of 1001009899 in words is "one billion, one million, nine thousand, eight hundred ninety-nine".