194563253 has 2 divisors, whose sum is σ = 194563254. Its totient is φ = 194563252.

The previous prime is 194563241. The next prime is 194563273. The reversal of 194563253 is 352365491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191490244 + 3073009 = 13838^2 + 1753^2 .

It is a cyclic number.

It is not a de Polignac number, because 194563253 - 2²² = 190368949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194563273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97281626 + 97281627.

It is an arithmetic number, because the mean of its divisors is an integer number (97281627).

Almost surely, 2^194563253 is an apocalyptic number.

It is an amenable number.

194563253 is a deficient number, since it is larger than the sum of its proper divisors (1).

194563253 is an equidigital number, since it uses as much as digits as its factorization.

194563253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The square root of 194563253 is about 13948.5932265587. The cubic root of 194563253 is about 579.4557448965.

The spelling of 194563253 in words is "one hundred ninety-four million, five hundred sixty-three thousand, two hundred fifty-three".