840072253 has 2 divisors, whose sum is σ = 840072254. Its totient is φ = 840072252.

The previous prime is 840072179. The next prime is 840072269. The reversal of 840072253 is 352270048.

840072253 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., 829555204 + 10517049 = 28802^2 + 3243^2 .

It is a cyclic number.

It is not a de Polignac number, because 840072253 - 2²⁵ = 806517821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840072353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420036126 + 420036127.

It is an arithmetic number, because the mean of its divisors is an integer number (420036127).

Almost surely, 2^840072253 is an apocalyptic number.

It is an amenable number.

840072253 is a deficient number, since it is larger than the sum of its proper divisors (1).

840072253 is an equidigital number, since it uses as much as digits as its factorization.

840072253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 840072253 is about 28983.9999482473. Note that the first 4 decimals coincide. The cubic root of 840072253 is about 943.5658482673.

The spelling of 840072253 in words is "eight hundred forty million, seventy-two thousand, two hundred fifty-three".