1949355019 has 4 divisors (see below), whose sum is σ = 1967239120. Its totient is φ = 1931470920.

The previous prime is 1949355013. The next prime is 1949355049. The reversal of 1949355019 is 9105539491.

It is a happy number.

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 1949355019 - 2³ = 1949355011 is a prime.

It is a super-2 number, since 2×1949355019² = 7599969980200980722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1949355019.

It is not an unprimeable number, because it can be changed into a prime (1949355011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8941887 + ... + 8942104.

It is an arithmetic number, because the mean of its divisors is an integer number (491809780).

Almost surely, 2^1949355019 is an apocalyptic number.

1949355019 is a deficient number, since it is larger than the sum of its proper divisors (17884101).

1949355019 is a wasteful number, since it uses less digits than its factorization.

1949355019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17884100.

The product of its (nonzero) digits is 218700, while the sum is 46.

The square root of 1949355019 is about 44151.5007559200. The cubic root of 1949355019 is about 1249.1952193604.

The spelling of 1949355019 in words is "one billion, nine hundred forty-nine million, three hundred fifty-five thousand, nineteen".