840994347 has 8 divisors (see below), whose sum is σ = 1127808144. Its totient is φ = 557421728.

The previous prime is 840994309. The next prime is 840994351. The reversal of 840994347 is 743499048.

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 840994347 - 2¹⁶ = 840928811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840994296 and 840994305.

It is not an unprimeable number, because it can be changed into a prime (840994307) 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, 809688 + ... + 810725.

It is an arithmetic number, because the mean of its divisors is an integer number (140976018).

Almost surely, 2^840994347 is an apocalyptic number.

840994347 is a deficient number, since it is larger than the sum of its proper divisors (286813797).

840994347 is a wasteful number, since it uses less digits than its factorization.

840994347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620589.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 840994347 is about 28999.9025343190. The cubic root of 840994347 is about 943.9109528155.

The spelling of 840994347 in words is "eight hundred forty million, nine hundred ninety-four thousand, three hundred forty-seven".