850688431 has 4 divisors (see below), whose sum is σ = 850781232. Its totient is φ = 850595632.

The previous prime is 850688411. The next prime is 850688471. The reversal of 850688431 is 134886058.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 850688431 - 2⁹ = 850687919 is a prime.

It is a super-2 number, since 2×850688431² = 1447341613274483522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850688411) 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, 30931 + ... + 51556.

It is an arithmetic number, because the mean of its divisors is an integer number (212695308).

Almost surely, 2^850688431 is an apocalyptic number.

850688431 is a deficient number, since it is larger than the sum of its proper divisors (92801).

850688431 is a wasteful number, since it uses less digits than its factorization.

850688431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92800.

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 850688431 is about 29166.5635788654. The cubic root of 850688431 is about 947.5239049670.

The spelling of 850688431 in words is "eight hundred fifty million, six hundred eighty-eight thousand, four hundred thirty-one".