1949559491 has 8 divisors (see below), whose sum is σ = 2133107184. Its totient is φ = 1767064320.

The previous prime is 1949559487. The next prime is 1949559509.

1949559491 is nontrivially palindromic in base 10.

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 1949559491 - 2² = 1949559487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949559401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259250 + ... + 266663.

It is an arithmetic number, because the mean of its divisors is an integer number (266638398).

Almost surely, 2^1949559491 is an apocalyptic number.

1949559491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1949559491 is a deficient number, since it is larger than the sum of its proper divisors (183547693).

1949559491 is a wasteful number, since it uses less digits than its factorization.

1949559491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526261.

The product of its digits is 2624400, while the sum is 56.

The square root of 1949559491 is about 44153.8162676795. The cubic root of 1949559491 is about 1249.2388947491.

The spelling of 1949559491 in words is "one billion, nine hundred forty-nine million, five hundred fifty-nine thousand, four hundred ninety-one".