782243491 has 16 divisors (see below), whose sum is σ = 863336448. Its totient is φ = 705513600.

The previous prime is 782243479. The next prime is 782243521. The reversal of 782243491 is 194342287.

It is a de Polignac number, because none of the positive numbers 2^k-782243491 is a prime.

It is a super-2 number, since 2×782243491² = 1223809758423734162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (782243431) 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 15 ways as a sum of consecutive naturals, for example, 47076 + ... + 61486.

It is an arithmetic number, because the mean of its divisors is an integer number (53958528).

Almost surely, 2^782243491 is an apocalyptic number.

782243491 is a deficient number, since it is larger than the sum of its proper divisors (81092957).

782243491 is a wasteful number, since it uses less digits than its factorization.

782243491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14562.

The product of its digits is 96768, while the sum is 40.

The square root of 782243491 is about 27968.6161795681. The cubic root of 782243491 is about 921.3981148494.

The spelling of 782243491 in words is "seven hundred eighty-two million, two hundred forty-three thousand, four hundred ninety-one".