2109794519 has 6 divisors (see below), whose sum is σ = 2454250824. Its totient is φ = 1808395260.

The previous prime is 2109794509. The next prime is 2109794521. The reversal of 2109794519 is 9154979012.

It is not a de Polignac number, because 2109794519 - 2¹⁶ = 2109728983 is a prime.

It is a super-2 number, since 2×2109794519² = 8902465824804882722, 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 (2109794509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21528467 + ... + 21528564.

It is an arithmetic number, because the mean of its divisors is an integer number (409041804).

Almost surely, 2^2109794519 is an apocalyptic number.

2109794519 is a deficient number, since it is larger than the sum of its proper divisors (344456305).

2109794519 is an equidigital number, since it uses as much as digits as its factorization.

2109794519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43057045 (or 43057038 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 2109794519 is about 45932.4995945137. The cubic root of 2109794519 is about 1282.5669756931.

The spelling of 2109794519 in words is "two billion, one hundred nine million, seven hundred ninety-four thousand, five hundred nineteen".