194990633 has 2 divisors, whose sum is σ = 194990634. Its totient is φ = 194990632.

The previous prime is 194990623. The next prime is 194990647. The reversal of 194990633 is 336099491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178409449 + 16581184 = 13357^2 + 4072^2 .

It is a cyclic number.

It is not a de Polignac number, because 194990633 - 2⁴ = 194990617 is a prime.

It is not a weakly prime, because it can be changed into another prime (194990623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97495316 + 97495317.

It is an arithmetic number, because the mean of its divisors is an integer number (97495317).

Almost surely, 2^194990633 is an apocalyptic number.

It is an amenable number.

194990633 is a deficient number, since it is larger than the sum of its proper divisors (1).

194990633 is an equidigital number, since it uses as much as digits as its factorization.

194990633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 194990633 is about 13963.9046473399. The cubic root of 194990633 is about 579.8797144534.

The spelling of 194990633 in words is "one hundred ninety-four million, nine hundred ninety thousand, six hundred thirty-three".