849393949 has 2 divisors, whose sum is σ = 849393950. Its totient is φ = 849393948.

The previous prime is 849393931. The next prime is 849393959. The reversal of 849393949 is 949393948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796932900 + 52461049 = 28230^2 + 7243^2 .

It is a cyclic number.

It is not a de Polignac number, because 849393949 - 2⁹ = 849393437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 849393893 and 849393902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849393959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424696974 + 424696975.

It is an arithmetic number, because the mean of its divisors is an integer number (424696975).

Almost surely, 2^849393949 is an apocalyptic number.

It is an amenable number.

849393949 is a deficient number, since it is larger than the sum of its proper divisors (1).

849393949 is an equidigital number, since it uses as much as digits as its factorization.

849393949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7558272, while the sum is 58.

The square root of 849393949 is about 29144.3639319852. The cubic root of 849393949 is about 947.0430492018.

Subtracting 849393949 from its reverse (949393948), we obtain a palindrome (99999999).

It can be divided in two parts, 84939 and 3949, that added together give a palindrome (88888).

The spelling of 849393949 in words is "eight hundred forty-nine million, three hundred ninety-three thousand, nine hundred forty-nine".