1994782997 has 2 divisors, whose sum is σ = 1994782998. Its totient is φ = 1994782996.

The previous prime is 1994782987. The next prime is 1994783003. The reversal of 1994782997 is 7992874991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1327800721 + 666982276 = 36439^2 + 25826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994782997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994782967) 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, 997391498 + 997391499.

It is an arithmetic number, because the mean of its divisors is an integer number (997391499).

Almost surely, 2^1994782997 is an apocalyptic number.

It is an amenable number.

1994782997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994782997 is an equidigital number, since it uses as much as digits as its factorization.

1994782997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 65.

The square root of 1994782997 is about 44662.9935964888. The cubic root of 1994782997 is about 1258.8245939897.

The spelling of 1994782997 in words is "one billion, nine hundred ninety-four million, seven hundred eighty-two thousand, nine hundred ninety-seven".