939806849 has 2 divisors, whose sum is σ = 939806850. Its totient is φ = 939806848.

The previous prime is 939806827. The next prime is 939806909. The reversal of 939806849 is 948608939.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 794845249 + 144961600 = 28193^2 + 12040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-939806849 is a prime.

It is a super-3 number, since 3×939806849³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 939806794 and 939806803.

It is not a weakly prime, because it can be changed into another prime (939106849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469903424 + 469903425.

It is an arithmetic number, because the mean of its divisors is an integer number (469903425).

Almost surely, 2^939806849 is an apocalyptic number.

It is an amenable number.

939806849 is a deficient number, since it is larger than the sum of its proper divisors (1).

939806849 is an equidigital number, since it uses as much as digits as its factorization.

939806849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 939806849 is about 30656.2693261917. The cubic root of 939806849 is about 979.5190090711.

The spelling of 939806849 in words is "nine hundred thirty-nine million, eight hundred six thousand, eight hundred forty-nine".