825949451 has 2 divisors, whose sum is σ = 825949452. Its totient is φ = 825949450.

The previous prime is 825949433. The next prime is 825949477. The reversal of 825949451 is 154949528.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 825949451 - 2¹⁰ = 825948427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 825949396 and 825949405.

It is not a weakly prime, because it can be changed into another prime (825943451) 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 as a sum of consecutive naturals, namely, 412974725 + 412974726.

It is an arithmetic number, because the mean of its divisors is an integer number (412974726).

Almost surely, 2^825949451 is an apocalyptic number.

825949451 is a deficient number, since it is larger than the sum of its proper divisors (1).

825949451 is an equidigital number, since it uses as much as digits as its factorization.

825949451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 47.

The square root of 825949451 is about 28739.3363006177. The cubic root of 825949451 is about 938.2483794030.

The spelling of 825949451 in words is "eight hundred twenty-five million, nine hundred forty-nine thousand, four hundred fifty-one".