491528773 has 4 divisors (see below), whose sum is σ = 501986880. Its totient is φ = 481070668.

The previous prime is 491528771. The next prime is 491528813. The reversal of 491528773 is 377825194.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 491528773 - 2¹ = 491528771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491528771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5228983 + ... + 5229076.

It is an arithmetic number, because the mean of its divisors is an integer number (125496720).

Almost surely, 2^491528773 is an apocalyptic number.

It is an amenable number.

491528773 is a deficient number, since it is larger than the sum of its proper divisors (10458107).

491528773 is a wasteful number, since it uses less digits than its factorization.

491528773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10458106.

The product of its digits is 423360, while the sum is 46.

The square root of 491528773 is about 22170.4481912297. The cubic root of 491528773 is about 789.1925590874.

The spelling of 491528773 in words is "four hundred ninety-one million, five hundred twenty-eight thousand, seven hundred seventy-three".