849409987 has 8 divisors (see below), whose sum is σ = 899571456. Its totient is φ = 800351112.

The previous prime is 849409963. The next prime is 849410011. The reversal of 849409987 is 789904948.

It is an interprime number because it is at equal distance from previous prime (849409963) and next prime (849410011).

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 849409987 - 2¹⁵ = 849377219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849409907) 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, 274063 + ... + 277144.

It is an arithmetic number, because the mean of its divisors is an integer number (112446432).

Almost surely, 2^849409987 is an apocalyptic number.

849409987 is a deficient number, since it is larger than the sum of its proper divisors (50161469).

849409987 is a wasteful number, since it uses less digits than its factorization.

849409987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551297.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 849409987 is about 29144.6390782250. The cubic root of 849409987 is about 947.0490097579.

The spelling of 849409987 in words is "eight hundred forty-nine million, four hundred nine thousand, nine hundred eighty-seven".