1994243023 has 2 divisors, whose sum is σ = 1994243024. Its totient is φ = 1994243022.

The previous prime is 1994243003. The next prime is 1994243077. The reversal of 1994243023 is 3203424991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1994243023 - 2¹³ = 1994234831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994243003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997121511 + 997121512.

It is an arithmetic number, because the mean of its divisors is an integer number (997121512).

Almost surely, 2^1994243023 is an apocalyptic number.

1994243023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994243023 is an equidigital number, since it uses as much as digits as its factorization.

1994243023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 1994243023 is about 44656.9482051786. The cubic root of 1994243023 is about 1258.7109986940.

The spelling of 1994243023 in words is "one billion, nine hundred ninety-four million, two hundred forty-three thousand, twenty-three".