850742459 has 12 divisors (see below), whose sum is σ = 994831488. Its totient is φ = 725382000.

The previous prime is 850742419. The next prime is 850742471. The reversal of 850742459 is 954247058.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-850742459 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (850742419) 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 in 11 ways as a sum of consecutive naturals, for example, 36092 + ... + 54809.

It is an arithmetic number, because the mean of its divisors is an integer number (82902624).

Almost surely, 2^850742459 is an apocalyptic number.

850742459 is a deficient number, since it is larger than the sum of its proper divisors (144089029).

850742459 is a wasteful number, since it uses less digits than its factorization.

850742459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91106 (or 91099 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 850742459 is about 29167.4897617193. The cubic root of 850742459 is about 947.5439639122.

The spelling of 850742459 in words is "eight hundred fifty million, seven hundred forty-two thousand, four hundred fifty-nine".