825721453 has 2 divisors, whose sum is σ = 825721454. Its totient is φ = 825721452.

The previous prime is 825721423. The next prime is 825721471. The reversal of 825721453 is 354127528.

825721453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 702356004 + 123365449 = 26502^2 + 11107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-825721453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825721423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412860726 + 412860727.

It is an arithmetic number, because the mean of its divisors is an integer number (412860727).

Almost surely, 2^825721453 is an apocalyptic number.

It is an amenable number.

825721453 is a deficient number, since it is larger than the sum of its proper divisors (1).

825721453 is an equidigital number, since it uses as much as digits as its factorization.

825721453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 825721453 is about 28735.3693729522. The cubic root of 825721453 is about 938.1620389939.

The spelling of 825721453 in words is "eight hundred twenty-five million, seven hundred twenty-one thousand, four hundred fifty-three".