840057553 has 2 divisors, whose sum is σ = 840057554. Its totient is φ = 840057552.

The previous prime is 840057523. The next prime is 840057557. The reversal of 840057553 is 355750048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840014289 + 43264 = 28983^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 840057553 - 2²⁵ = 806503121 is a prime.

It is not a weakly prime, because it can be changed into another prime (840057557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420028776 + 420028777.

It is an arithmetic number, because the mean of its divisors is an integer number (420028777).

Almost surely, 2^840057553 is an apocalyptic number.

It is an amenable number.

840057553 is a deficient number, since it is larger than the sum of its proper divisors (1).

840057553 is an equidigital number, since it uses as much as digits as its factorization.

840057553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 840057553 is about 28983.7463589509. The cubic root of 840057553 is about 943.5603445745.

The spelling of 840057553 in words is "eight hundred forty million, fifty-seven thousand, five hundred fifty-three".