849839668 has 6 divisors (see below), whose sum is σ = 1487219426. Its totient is φ = 424919832.

The previous prime is 849839663. The next prime is 849839687. The reversal of 849839668 is 866938948.

It can be written as a sum of positive squares in only one way, i.e., 488763664 + 361076004 = 22108^2 + 19002^2 .

It is a super-2 number, since 2×849839668² = 1444454922612700448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849839663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106229955 + ... + 106229962.

Almost surely, 2^849839668 is an apocalyptic number.

It is an amenable number.

849839668 is a deficient number, since it is larger than the sum of its proper divisors (637379758).

849839668 is a wasteful number, since it uses less digits than its factorization.

849839668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212459921 (or 212459919 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 61.

The square root of 849839668 is about 29152.0096734342. The cubic root of 849839668 is about 947.2086736717.

The spelling of 849839668 in words is "eight hundred forty-nine million, eight hundred thirty-nine thousand, six hundred sixty-eight".