491934745 has 4 divisors (see below), whose sum is σ = 590321700. Its totient is φ = 393547792.

The previous prime is 491934731. The next prime is 491934791. The reversal of 491934745 is 547439194.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205377561 + 286557184 = 14331^2 + 16928^2 .

It is a cyclic number.

It is not a de Polignac number, because 491934745 - 2⁵ = 491934713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491934695 and 491934704.

It is an unprimeable number.

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, 49193470 + ... + 49193479.

It is an arithmetic number, because the mean of its divisors is an integer number (147580425).

Almost surely, 2^491934745 is an apocalyptic number.

It is an amenable number.

491934745 is a deficient number, since it is larger than the sum of its proper divisors (98386955).

491934745 is an equidigital number, since it uses as much as digits as its factorization.

491934745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98386954.

The product of its digits is 544320, while the sum is 46.

The square root of 491934745 is about 22179.6020027412. The cubic root of 491934745 is about 789.4097738482.

The spelling of 491934745 in words is "four hundred ninety-one million, nine hundred thirty-four thousand, seven hundred forty-five".