1949803919 has 8 divisors (see below), whose sum is σ = 2231723808. Its totient is φ = 1668728160.

The previous prime is 1949803907. The next prime is 1949803937. The reversal of 1949803919 is 9193089491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1949803919 - 2⁴ = 1949803903 is a prime.

It is a super-2 number, since 2×1949803919² = 7603470645095517122, 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 (1949803019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206072 + ... + 215325.

It is an arithmetic number, because the mean of its divisors is an integer number (278965476).

Almost surely, 2^1949803919 is an apocalyptic number.

1949803919 is a deficient number, since it is larger than the sum of its proper divisors (281919889).

1949803919 is an equidigital number, since it uses as much as digits as its factorization.

1949803919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422065.

The product of its (nonzero) digits is 629856, while the sum is 53.

The square root of 1949803919 is about 44156.5840956929. The cubic root of 1949803919 is about 1249.2911007655.

The spelling of 1949803919 in words is "one billion, nine hundred forty-nine million, eight hundred three thousand, nine hundred nineteen".