825486491 has 4 divisors (see below), whose sum is σ = 861377232. Its totient is φ = 789595752.

The previous prime is 825486463. The next prime is 825486499. The reversal of 825486491 is 194684528.

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

It is a cyclic number.

It is not a de Polignac number, because 825486491 - 2¹⁰ = 825485467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (825486499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17945336 + ... + 17945381.

It is an arithmetic number, because the mean of its divisors is an integer number (215344308).

Almost surely, 2^825486491 is an apocalyptic number.

825486491 is a deficient number, since it is larger than the sum of its proper divisors (35890741).

825486491 is a wasteful number, since it uses less digits than its factorization.

825486491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35890740.

The product of its digits is 552960, while the sum is 47.

The square root of 825486491 is about 28731.2807058787. The cubic root of 825486491 is about 938.0730447615.

The spelling of 825486491 in words is "eight hundred twenty-five million, four hundred eighty-six thousand, four hundred ninety-one".