849969949 has 8 divisors (see below), whose sum is σ = 888243840. Its totient is φ = 812537376.

The previous prime is 849969937. The next prime is 849969977. The reversal of 849969949 is 949969948.

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 849969949 - 2⁵ = 849969917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849969049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208264 + ... + 212305.

It is an arithmetic number, because the mean of its divisors is an integer number (111030480).

Almost surely, 2^849969949 is an apocalyptic number.

It is an amenable number.

849969949 is a deficient number, since it is larger than the sum of its proper divisors (38273891).

849969949 is a wasteful number, since it uses less digits than its factorization.

849969949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420659.

The product of its digits is 45349632, while the sum is 67.

The square root of 849969949 is about 29154.2440992731. The cubic root of 849969949 is about 947.2570737768.

Subtracting 849969949 from its reverse (949969948), we obtain a palindrome (99999999).

The spelling of 849969949 in words is "eight hundred forty-nine million, nine hundred sixty-nine thousand, nine hundred forty-nine".