840774229 has 2 divisors, whose sum is σ = 840774230. Its totient is φ = 840774228.

The previous prime is 840774217. The next prime is 840774241. The reversal of 840774229 is 922477048.

It is a balanced prime because it is at equal distance from previous prime (840774217) and next prime (840774241).

It can be written as a sum of positive squares in only one way, i.e., 499522500 + 341251729 = 22350^2 + 18473^2 .

It is a cyclic number.

It is not a de Polignac number, because 840774229 - 2¹¹ = 840772181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840774029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420387114 + 420387115.

It is an arithmetic number, because the mean of its divisors is an integer number (420387115).

Almost surely, 2^840774229 is an apocalyptic number.

It is an amenable number.

840774229 is a deficient number, since it is larger than the sum of its proper divisors (1).

840774229 is an equidigital number, since it uses as much as digits as its factorization.

840774229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 840774229 is about 28996.1071352690. The cubic root of 840774229 is about 943.8285939897.

The spelling of 840774229 in words is "eight hundred forty million, seven hundred seventy-four thousand, two hundred twenty-nine".