1949075819 has 8 divisors (see below), whose sum is σ = 2018306160. Its totient is φ = 1879980256.

The previous prime is 1949075747. The next prime is 1949075827. The reversal of 1949075819 is 9185709491.

1949075819 = 3260² + 3261² + ... + 3433².

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 1949075819 - 2¹² = 1949071723 is a prime.

It is a super-2 number, since 2×1949075819² = 7597793096421041522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949075839) 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, 3797 + ... + 62550.

It is an arithmetic number, because the mean of its divisors is an integer number (252288270).

Almost surely, 2^1949075819 is an apocalyptic number.

1949075819 is a deficient number, since it is larger than the sum of its proper divisors (69230341).

1949075819 is a wasteful number, since it uses less digits than its factorization.

1949075819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67389.

The product of its (nonzero) digits is 816480, while the sum is 53.

The square root of 1949075819 is about 44148.3388022698. The cubic root of 1949075819 is about 1249.1355770762.

The spelling of 1949075819 in words is "one billion, nine hundred forty-nine million, seventy-five thousand, eight hundred nineteen".