1999999017 has 48 divisors (see below), whose sum is σ = 3205433088. Its totient is φ = 1195223040.

The previous prime is 1999999013. The next prime is 1999999049. The reversal of 1999999017 is 7109999991.

It is not a de Polignac number, because 1999999017 - 2² = 1999999013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999999013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 924417 + ... + 926577.

It is an arithmetic number, because the mean of its divisors is an integer number (66779856).

Almost surely, 2^1999999017 is an apocalyptic number.

1999999017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1999999017 is a deficient number, since it is larger than the sum of its proper divisors (1205434071).

1999999017 is a wasteful number, since it uses less digits than its factorization.

1999999017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470 (or 2467 counting only the distinct ones).

The product of its (nonzero) digits is 3720087, while the sum is 63.

The square root of 1999999017 is about 44721.3485597203. The cubic root of 1999999017 is about 1259.9208434778.

The spelling of 1999999017 in words is "one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seventeen".