994197391 has 8 divisors (see below), whose sum is σ = 1094178384. Its totient is φ = 895816320.

The previous prime is 994197371. The next prime is 994197403. The reversal of 994197391 is 193791499.

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 994197391 - 2⁷ = 994197263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994197371) 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, 398676 + ... + 401161.

It is an arithmetic number, because the mean of its divisors is an integer number (136772298).

Almost surely, 2^994197391 is an apocalyptic number.

994197391 is a deficient number, since it is larger than the sum of its proper divisors (99980993).

994197391 is a wasteful number, since it uses less digits than its factorization.

994197391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799961.

The product of its digits is 551124, while the sum is 52.

The square root of 994197391 is about 31530.8958166431. The cubic root of 994197391 is about 998.0620437517.

The spelling of 994197391 in words is "nine hundred ninety-four million, one hundred ninety-seven thousand, three hundred ninety-one".