840814249 has 8 divisors (see below), whose sum is σ = 919755648. Its totient is φ = 762290160.

The previous prime is 840814241. The next prime is 840814253. The reversal of 840814249 is 942418048.

It is a happy number.

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 840814249 - 2³ = 840814241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840814241) 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, 100102 + ... + 108175.

It is an arithmetic number, because the mean of its divisors is an integer number (114969456).

Almost surely, 2^840814249 is an apocalyptic number.

It is an amenable number.

840814249 is a deficient number, since it is larger than the sum of its proper divisors (78941399).

840814249 is a wasteful number, since it uses less digits than its factorization.

840814249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208655.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 840814249 is about 28996.7972196931. The cubic root of 840814249 is about 943.8435688465.

The spelling of 840814249 in words is "eight hundred forty million, eight hundred fourteen thousand, two hundred forty-nine".