994042991 has 8 divisors (see below), whose sum is σ = 1019562768. Its totient is φ = 968584000.

The previous prime is 994042967. The next prime is 994043041. The reversal of 994042991 is 199240499.

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

It is not a de Polignac number, because 994042991 - 2⁶ = 994042927 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 (994042901) 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, 18896 + ... + 48426.

It is an arithmetic number, because the mean of its divisors is an integer number (127445346).

Almost surely, 2^994042991 is an apocalyptic number.

994042991 is a deficient number, since it is larger than the sum of its proper divisors (25519777).

994042991 is a wasteful number, since it uses less digits than its factorization.

994042991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30393.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 994042991 is about 31528.4473293564. The cubic root of 994042991 is about 998.0103743485.

The spelling of 994042991 in words is "nine hundred ninety-four million, forty-two thousand, nine hundred ninety-one".