491730625 has 15 divisors (see below), whose sum is σ = 615160117. Its totient is φ = 392941000.

The previous prime is 491730623. The next prime is 491730653. The reversal of 491730625 is 526037194.

The square root of 491730625 is 22175.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 38551681 + 453178944 = 6209^2 + 21288^2 .

It is not a de Polignac number, because 491730625 - 2¹ = 491730623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491730623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 553932 + ... + 554818.

Almost surely, 2^491730625 is an apocalyptic number.

491730625 is the 22175-th square number.

491730625 is the 11088-th centered octagonal number.

It is an amenable number.

491730625 is a deficient number, since it is larger than the sum of its proper divisors (123429492).

491730625 is an frugal number, since it uses more digits than its factorization.

491730625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The cubic root of 491730625 is about 789.3005746665.

The spelling of 491730625 in words is "four hundred ninety-one million, seven hundred thirty thousand, six hundred twenty-five".