849904993 has 8 divisors (see below), whose sum is σ = 1013551488. Its totient is φ = 696816384.

The previous prime is 849904981. The next prime is 849905033. The reversal of 849904993 is 399409948.

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 849904993 - 2⁵ = 849904961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (849904963) 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, 2639296 + ... + 2639617.

It is an arithmetic number, because the mean of its divisors is an integer number (126693936).

Almost surely, 2^849904993 is an apocalyptic number.

It is an amenable number.

849904993 is a deficient number, since it is larger than the sum of its proper divisors (163646495).

849904993 is a wasteful number, since it uses less digits than its factorization.

849904993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278943.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 849904993 is about 29153.1300720866. The cubic root of 849904993 is about 947.2329428852.

The spelling of 849904993 in words is "eight hundred forty-nine million, nine hundred four thousand, nine hundred ninety-three".