491147325 has 18 divisors (see below), whose sum is σ = 879699834. Its totient is φ = 261945120.

The previous prime is 491147317. The next prime is 491147341. The reversal of 491147325 is 523741194.

491147325 is a `hidden beast` number, since 491 + 147 + 3 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 145298916 + 345848409 = 12054^2 + 18597^2 .

It is not a de Polignac number, because 491147325 - 2³ = 491147317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491147325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1091214 + ... + 1091663.

It is an arithmetic number, because the mean of its divisors is an integer number (48872213).

Almost surely, 2^491147325 is an apocalyptic number.

491147325 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491147325 is a deficient number, since it is larger than the sum of its proper divisors (388552509).

491147325 is a wasteful number, since it uses less digits than its factorization.

491147325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182893 (or 2182885 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 491147325 is about 22161.8438989178. The cubic root of 491147325 is about 788.9883568475.

The spelling of 491147325 in words is "four hundred ninety-one million, one hundred forty-seven thousand, three hundred twenty-five".