994631831 has 2 divisors, whose sum is σ = 994631832. Its totient is φ = 994631830.

The previous prime is 994631819. The next prime is 994631851. The reversal of 994631831 is 138136499.

994631831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (138136499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994631831 is a prime.

It is a super-2 number, since 2×994631831² = 1978584958476825122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994631851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497315915 + 497315916.

It is an arithmetic number, because the mean of its divisors is an integer number (497315916).

Almost surely, 2^994631831 is an apocalyptic number.

994631831 is a deficient number, since it is larger than the sum of its proper divisors (1).

994631831 is an equidigital number, since it uses as much as digits as its factorization.

994631831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 994631831 is about 31537.7841802496. The cubic root of 994631831 is about 998.2073988345.

The spelling of 994631831 in words is "nine hundred ninety-four million, six hundred thirty-one thousand, eight hundred thirty-one".