825187901 has 2 divisors, whose sum is σ = 825187902. Its totient is φ = 825187900.

The previous prime is 825187849. The next prime is 825187963. The reversal of 825187901 is 109781528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768952900 + 56235001 = 27730^2 + 7499^2 .

It is a cyclic number.

It is not a de Polignac number, because 825187901 - 2¹⁰ = 825186877 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825187201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412593950 + 412593951.

It is an arithmetic number, because the mean of its divisors is an integer number (412593951).

Almost surely, 2^825187901 is an apocalyptic number.

It is an amenable number.

825187901 is a deficient number, since it is larger than the sum of its proper divisors (1).

825187901 is an equidigital number, since it uses as much as digits as its factorization.

825187901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 825187901 is about 28726.0839830284. The cubic root of 825187901 is about 937.9599264116.

The spelling of 825187901 in words is "eight hundred twenty-five million, one hundred eighty-seven thousand, nine hundred one".