994170921 has 8 divisors (see below), whose sum is σ = 1335680544. Its totient is φ = 657720960.

The previous prime is 994170913. The next prime is 994170959. The reversal of 994170921 is 129071499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 994170921 - 2³ = 994170913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (994170971) 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, 1264456 + ... + 1265241.

It is an arithmetic number, because the mean of its divisors is an integer number (166960068).

Almost surely, 2^994170921 is an apocalyptic number.

It is an amenable number.

994170921 is a deficient number, since it is larger than the sum of its proper divisors (341509623).

994170921 is a wasteful number, since it uses less digits than its factorization.

994170921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529831.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 994170921 is about 31530.4760668151. The cubic root of 994170921 is about 998.0531860416.

The spelling of 994170921 in words is "nine hundred ninety-four million, one hundred seventy thousand, nine hundred twenty-one".