994491623 has 2 divisors, whose sum is σ = 994491624. Its totient is φ = 994491622.

The previous prime is 994491599. The next prime is 994491671. The reversal of 994491623 is 326194499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 994491623 - 2¹⁴ = 994475239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994491683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497245811 + 497245812.

It is an arithmetic number, because the mean of its divisors is an integer number (497245812).

Almost surely, 2^994491623 is an apocalyptic number.

994491623 is a deficient number, since it is larger than the sum of its proper divisors (1).

994491623 is an equidigital number, since it uses as much as digits as its factorization.

994491623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 994491623 is about 31535.5612444110. The cubic root of 994491623 is about 998.1604926208.

The spelling of 994491623 in words is "nine hundred ninety-four million, four hundred ninety-one thousand, six hundred twenty-three".