850400437 has 4 divisors (see below), whose sum is σ = 879724620. Its totient is φ = 821076256.

The previous prime is 850400417. The next prime is 850400443. The reversal of 850400437 is 734004058.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 570540996 + 279859441 = 23886^2 + 16729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850400437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 850400399 and 850400408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850400417) 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 3 ways as a sum of consecutive naturals, for example, 14662048 + ... + 14662105.

It is an arithmetic number, because the mean of its divisors is an integer number (219931155).

Almost surely, 2^850400437 is an apocalyptic number.

It is an amenable number.

850400437 is a deficient number, since it is larger than the sum of its proper divisors (29324183).

850400437 is a wasteful number, since it uses less digits than its factorization.

850400437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29324182.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 850400437 is about 29161.6261034943. The cubic root of 850400437 is about 947.4169672645.

The spelling of 850400437 in words is "eight hundred fifty million, four hundred thousand, four hundred thirty-seven".