850400071 has 4 divisors (see below), whose sum is σ = 853928944. Its totient is φ = 846871200.

The previous prime is 850400069. The next prime is 850400101. The reversal of 850400071 is 170004058.

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

It is a cyclic number.

It is not a de Polignac number, because 850400071 - 2¹ = 850400069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850400021) 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, 1764075 + ... + 1764556.

It is an arithmetic number, because the mean of its divisors is an integer number (213482236).

Almost surely, 2^850400071 is an apocalyptic number.

850400071 is a deficient number, since it is larger than the sum of its proper divisors (3528873).

850400071 is a wasteful number, since it uses less digits than its factorization.

850400071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528872.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 850400071 is about 29161.6198281234. The cubic root of 850400071 is about 947.4168313463.

The spelling of 850400071 in words is "eight hundred fifty million, four hundred thousand, seventy-one".