840088829 has 2 divisors, whose sum is σ = 840088830. Its totient is φ = 840088828.

The previous prime is 840088801. The next prime is 840088841. The reversal of 840088829 is 928880048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505125625 + 334963204 = 22475^2 + 18302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840088829 is a prime.

It is a super-2 number, since 2×840088829² = 1411498481221182482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840088859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420044414 + 420044415.

It is an arithmetic number, because the mean of its divisors is an integer number (420044415).

Almost surely, 2^840088829 is an apocalyptic number.

It is an amenable number.

840088829 is a deficient number, since it is larger than the sum of its proper divisors (1).

840088829 is an equidigital number, since it uses as much as digits as its factorization.

840088829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912, while the sum is 47.

The square root of 840088829 is about 28984.2858977067. The cubic root of 840088829 is about 943.5720542591.

The spelling of 840088829 in words is "eight hundred forty million, eighty-eight thousand, eight hundred twenty-nine".