825187049 has 2 divisors, whose sum is σ = 825187050. Its totient is φ = 825187048.

The previous prime is 825186961. The next prime is 825187067. The reversal of 825187049 is 940781528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 445210000 + 379977049 = 21100^2 + 19493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825187049 is a prime.

It is equal to p_42373988 and since 825187049 and 42373988 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (825187849) 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, 412593524 + 412593525.

It is an arithmetic number, because the mean of its divisors is an integer number (412593525).

Almost surely, 2^825187049 is an apocalyptic number.

It is an amenable number.

825187049 is a deficient number, since it is larger than the sum of its proper divisors (1).

825187049 is an equidigital number, since it uses as much as digits as its factorization.

825187049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 825187049 is about 28726.0691532970. The cubic root of 825187049 is about 937.9596035994.

The spelling of 825187049 in words is "eight hundred twenty-five million, one hundred eighty-seven thousand, forty-nine".