7019899919 has 4 divisors (see below), whose sum is σ = 7022850600. Its totient is φ = 7016949240.

The previous prime is 7019899907. The next prime is 7019899927. The reversal of 7019899919 is 9199989107.

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 7019899919 - 2¹⁶ = 7019834383 is a prime.

It is a super-2 number, since 2×7019899919² = 98557989745552413122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7019899969) 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, 1471769 + ... + 1476530.

It is an arithmetic number, because the mean of its divisors is an integer number (1755712650).

Almost surely, 2^7019899919 is an apocalyptic number.

7019899919 is a deficient number, since it is larger than the sum of its proper divisors (2950681).

7019899919 is a wasteful number, since it uses less digits than its factorization.

7019899919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950680.

The product of its (nonzero) digits is 3306744, while the sum is 62.

The square root of 7019899919 is about 83784.8430147124. The cubic root of 7019899919 is about 1914.7421903638.

The spelling of 7019899919 in words is "seven billion, nineteen million, eight hundred ninety-nine thousand, nine hundred nineteen".