919983491 has 8 divisors (see below), whose sum is σ = 1055924064. Its totient is φ = 785171520.

The previous prime is 919983473. The next prime is 919983521. The reversal of 919983491 is 194389919.

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

It is not a de Polignac number, because 919983491 - 2¹⁸ = 919721347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919983431) 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, 280400 + ... + 283661.

It is an arithmetic number, because the mean of its divisors is an integer number (131990508).

Almost surely, 2^919983491 is an apocalyptic number.

919983491 is a deficient number, since it is larger than the sum of its proper divisors (135940573).

919983491 is a wasteful number, since it uses less digits than its factorization.

919983491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564301.

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

The square root of 919983491 is about 30331.2296321794. The cubic root of 919983491 is about 972.5830086229.

The spelling of 919983491 in words is "nine hundred nineteen million, nine hundred eighty-three thousand, four hundred ninety-one".