1000000019 has 4 divisors (see below), whose sum is σ = 1012048296. Its totient is φ = 987951744.

The previous prime is 1000000009. The next prime is 1000000021. The reversal of 1000000019 is 9100000001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000000019 - 2¹⁶ = 999934483 is a prime.

It is a super-2 number, since 2×1000000019² = 2000000076000000722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999999946 and 1000000009.

It is not an unprimeable number, because it can be changed into a prime (1000000009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6024014 + ... + 6024179.

It is an arithmetic number, because the mean of its divisors is an integer number (253012074).

Almost surely, 2^1000000019 is an apocalyptic number.

1000000019 is a deficient number, since it is larger than the sum of its proper divisors (12048277).

1000000019 is an equidigital number, since it uses as much as digits as its factorization.

1000000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048276.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 1000000019 is about 31622.7769021002. The cubic root of 1000000019 is about 1000.0000063333. Note that the first 5 decimals are identical.

It can be divided in two parts, 100000001 and 9, that multiplied together give a palindrome (900000009).

The spelling of 1000000019 in words is "one billion, nineteen", and thus it is an aban number and an uban number.