1994011001 has 2 divisors, whose sum is σ = 1994011002. Its totient is φ = 1994011000.

The previous prime is 1994010989. The next prime is 1994011027. The reversal of 1994011001 is 1001104991.

It is an a-pointer prime, because the next prime (1994011027) can be obtained adding 1994011001 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1497612601 + 496398400 = 38699^2 + 22280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994011001 - 2¹⁰ = 1994009977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1994011051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997005500 + 997005501.

It is an arithmetic number, because the mean of its divisors is an integer number (997005501).

Almost surely, 2^1994011001 is an apocalyptic number.

It is an amenable number.

1994011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994011001 is an equidigital number, since it uses as much as digits as its factorization.

1994011001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1994011001 is about 44654.3503031899. The cubic root of 1994011001 is about 1258.6621815126.

Adding to 1994011001 its reverse (1001104991), we get a palindrome (2995115992).

The spelling of 1994011001 in words is "one billion, nine hundred ninety-four million, eleven thousand, one".