850153921 has 8 divisors (see below), whose sum is σ = 873581544. Its totient is φ = 826750080.

The previous prime is 850153897. The next prime is 850153943. The reversal of 850153921 is 129351058.

It can be written as a sum of positive squares in 4 ways, for example, as 401561521 + 448592400 = 20039^2 + 21180^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 850153921 - 2⁷ = 850153793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (850156921) 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 7 ways as a sum of consecutive naturals, for example, 85611 + ... + 95023.

It is an arithmetic number, because the mean of its divisors is an integer number (109197693).

Almost surely, 2^850153921 is an apocalyptic number.

It is an amenable number.

850153921 is a deficient number, since it is larger than the sum of its proper divisors (23427623).

850153921 is a wasteful number, since it uses less digits than its factorization.

850153921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11891.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 850153921 is about 29157.3990781071. The cubic root of 850153921 is about 947.3254119601.

The spelling of 850153921 in words is "eight hundred fifty million, one hundred fifty-three thousand, nine hundred twenty-one".