1020001899 has 16 divisors (see below), whose sum is σ = 1555787520. Its totient is φ = 582296160.

The previous prime is 1020001867. The next prime is 1020001919. The reversal of 1020001899 is 9981000201.

It is not a de Polignac number, because 1020001899 - 2⁵ = 1020001867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020001859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609 + ... + 45170.

It is an arithmetic number, because the mean of its divisors is an integer number (97236720).

Almost surely, 2^1020001899 is an apocalyptic number.

1020001899 is a deficient number, since it is larger than the sum of its proper divisors (535785621).

1020001899 is a wasteful number, since it uses less digits than its factorization.

1020001899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46850.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1020001899 is about 31937.4685753270. The cubic root of 1020001899 is about 1006.6233342579.

The spelling of 1020001899 in words is "one billion, twenty million, one thousand, eight hundred ninety-nine".