825999997 has 2 divisors, whose sum is σ = 825999998. Its totient is φ = 825999996.

The previous prime is 825999983. The next prime is 826000003. The reversal of 825999997 is 799999528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618467161 + 207532836 = 24869^2 + 14406^2 .

It is a cyclic number.

It is not a de Polignac number, because 825999997 - 2¹⁹ = 825475709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825999947) 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, 412999998 + 412999999.

It is an arithmetic number, because the mean of its divisors is an integer number (412999999).

Almost surely, 2^825999997 is an apocalyptic number.

It is an amenable number.

825999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

825999997 is an equidigital number, since it uses as much as digits as its factorization.

825999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33067440, while the sum is 67.

The square root of 825999997 is about 28740.2156742082. The cubic root of 825999997 is about 938.2675184820.

The spelling of 825999997 in words is "eight hundred twenty-five million, nine hundred ninety-nine thousand, nine hundred ninety-seven".