825771601 has 2 divisors, whose sum is σ = 825771602. Its totient is φ = 825771600.

The previous prime is 825771593. The next prime is 825771619. The reversal of 825771601 is 106177528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 728946001 + 96825600 = 26999^2 + 9840^2 .

It is a cyclic number.

It is not a de Polignac number, because 825771601 - 2³ = 825771593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (825771101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412885800 + 412885801.

It is an arithmetic number, because the mean of its divisors is an integer number (412885801).

Almost surely, 2^825771601 is an apocalyptic number.

It is an amenable number.

825771601 is a deficient number, since it is larger than the sum of its proper divisors (1).

825771601 is an equidigital number, since it uses as much as digits as its factorization.

825771601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 825771601 is about 28736.2419428846. The cubic root of 825771601 is about 938.1810308695.

The spelling of 825771601 in words is "eight hundred twenty-five million, seven hundred seventy-one thousand, six hundred one".