1994204393 has 2 divisors, whose sum is σ = 1994204394. Its totient is φ = 1994204392.

The previous prime is 1994204383. The next prime is 1994204441. The reversal of 1994204393 is 3934024991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1675510489 + 318693904 = 40933^2 + 17852^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994204393 - 2⁸ = 1994204137 is a prime.

It is a super-2 number, since 2×1994204393² = 7953702322120996898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1994204353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997102196 + 997102197.

It is an arithmetic number, because the mean of its divisors is an integer number (997102197).

Almost surely, 2^1994204393 is an apocalyptic number.

It is an amenable number.

1994204393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994204393 is an equidigital number, since it uses as much as digits as its factorization.

1994204393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1994204393 is about 44656.5156836043. The cubic root of 1994204393 is about 1258.7028712459.

The spelling of 1994204393 in words is "one billion, nine hundred ninety-four million, two hundred four thousand, three hundred ninety-three".