994042901 has 2 divisors, whose sum is σ = 994042902. Its totient is φ = 994042900.

The previous prime is 994042871. The next prime is 994042913. The reversal of 994042901 is 109240499.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637815025 + 356227876 = 25255^2 + 18874^2 .

It is an emirp because it is prime and its reverse (109240499) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994042901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994042601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497021450 + 497021451.

It is an arithmetic number, because the mean of its divisors is an integer number (497021451).

Almost surely, 2^994042901 is an apocalyptic number.

It is an amenable number.

994042901 is a deficient number, since it is larger than the sum of its proper divisors (1).

994042901 is an equidigital number, since it uses as much as digits as its factorization.

994042901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 994042901 is about 31528.4459020739. The cubic root of 994042901 is about 998.0103442287.

The spelling of 994042901 in words is "nine hundred ninety-four million, forty-two thousand, nine hundred one".