840734469 has 6 divisors (see below), whose sum is σ = 1214394246. Its totient is φ = 560489640.

The previous prime is 840734429. The next prime is 840734471. The reversal of 840734469 is 964437048.

It can be written as a sum of positive squares in only one way, i.e., 752843844 + 87890625 = 27438^2 + 9375^2 .

It is not a de Polignac number, because 840734469 - 2¹⁷ = 840603397 is a prime.

It is a super-2 number, since 2×840734469² = 1413668894729423922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840734429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46707462 + ... + 46707479.

It is an arithmetic number, because the mean of its divisors is an integer number (202399041).

Almost surely, 2^840734469 is an apocalyptic number.

It is an amenable number.

840734469 is a deficient number, since it is larger than the sum of its proper divisors (373659777).

840734469 is a wasteful number, since it uses less digits than its factorization.

840734469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93414947 (or 93414944 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 840734469 is about 28995.4215178880. The cubic root of 840734469 is about 943.8137159502.

The spelling of 840734469 in words is "eight hundred forty million, seven hundred thirty-four thousand, four hundred sixty-nine".