850049405 has 4 divisors (see below), whose sum is σ = 1020059292. Its totient is φ = 680039520.

The previous prime is 850049399. The next prime is 850049407. The reversal of 850049405 is 504940058.

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 529138009 + 320911396 = 23003^2 + 17914^2 .

It is not a de Polignac number, because 850049405 - 2²⁰ = 849000829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850049407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85004936 + ... + 85004945.

It is an arithmetic number, because the mean of its divisors is an integer number (255014823).

Almost surely, 2^850049405 is an apocalyptic number.

It is an amenable number.

850049405 is a deficient number, since it is larger than the sum of its proper divisors (170009887).

850049405 is a wasteful number, since it uses less digits than its factorization.

850049405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170009886.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 850049405 is about 29155.6067506749. The cubic root of 850049405 is about 947.2865896881.

The spelling of 850049405 in words is "eight hundred fifty million, forty-nine thousand, four hundred five".