1994943701 has 2 divisors, whose sum is σ = 1994943702. Its totient is φ = 1994943700.

The previous prime is 1994943673. The next prime is 1994943799. The reversal of 1994943701 is 1073494991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1721835025 + 273108676 = 41495^2 + 16526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994943701 - 2²⁶ = 1927834837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994948701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997471850 + 997471851.

It is an arithmetic number, because the mean of its divisors is an integer number (997471851).

Almost surely, 2^1994943701 is an apocalyptic number.

It is an amenable number.

1994943701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994943701 is an equidigital number, since it uses as much as digits as its factorization.

1994943701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1994943701 is about 44664.7926335721. The cubic root of 1994943701 is about 1258.8583976191.

The spelling of 1994943701 in words is "one billion, nine hundred ninety-four million, nine hundred forty-three thousand, seven hundred one".