994897691 has 2 divisors, whose sum is σ = 994897692. Its totient is φ = 994897690.

The previous prime is 994897667. The next prime is 994897697. The reversal of 994897691 is 196798499.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (196798499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994897691 - 2²² = 990703387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (994897697) 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, 497448845 + 497448846.

It is an arithmetic number, because the mean of its divisors is an integer number (497448846).

Almost surely, 2^994897691 is an apocalyptic number.

994897691 is a deficient number, since it is larger than the sum of its proper divisors (1).

994897691 is an equidigital number, since it uses as much as digits as its factorization.

994897691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 62.

The square root of 994897691 is about 31541.9988428127. The cubic root of 994897691 is about 998.2963294884.

The spelling of 994897691 in words is "nine hundred ninety-four million, eight hundred ninety-seven thousand, six hundred ninety-one".