994777813 has 8 divisors (see below), whose sum is σ = 1064301920. Its totient is φ = 926970480.

The previous prime is 994777769. The next prime is 994777841. The reversal of 994777813 is 318777499.

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

It is not a de Polignac number, because 994777813 - 2²⁵ = 961223381 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 (994777873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427995 + ... + 430312.

It is an arithmetic number, because the mean of its divisors is an integer number (133037740).

Almost surely, 2^994777813 is an apocalyptic number.

It is an amenable number.

994777813 is a deficient number, since it is larger than the sum of its proper divisors (69524107).

994777813 is a wasteful number, since it uses less digits than its factorization.

994777813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858387.

The product of its digits is 2667168, while the sum is 55.

The square root of 994777813 is about 31540.0984938221. The cubic root of 994777813 is about 998.2562320407.

The spelling of 994777813 in words is "nine hundred ninety-four million, seven hundred seventy-seven thousand, eight hundred thirteen".