9850921309 has 4 divisors (see below), whose sum is σ = 9859221504. Its totient is φ = 9842621116.

The previous prime is 9850921291. The next prime is 9850921331. The reversal of 9850921309 is 9031290589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9031290589 = 28087 ⋅321547.

It is a cyclic number.

It is not a de Polignac number, because 9850921309 - 2²³ = 9842532701 is a prime.

It is a super-2 number, since 2×9850921309² (a number of 21 digits) 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 (9850921009) 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, 4148317 + ... + 4150690.

It is an arithmetic number, because the mean of its divisors is an integer number (2464805376).

Almost surely, 2^9850921309 is an apocalyptic number.

It is an amenable number.

9850921309 is a deficient number, since it is larger than the sum of its proper divisors (8300195).

9850921309 is a wasteful number, since it uses less digits than its factorization.

9850921309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300194.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 9850921309 is about 99251.8075855548. The cubic root of 9850921309 is about 2143.6750336032.

The spelling of 9850921309 in words is "nine billion, eight hundred fifty million, nine hundred twenty-one thousand, three hundred nine".