194894213 has 2 divisors, whose sum is σ = 194894214. Its totient is φ = 194894212.

The previous prime is 194894173. The next prime is 194894233. The reversal of 194894213 is 312498491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135326689 + 59567524 = 11633^2 + 7718^2 .

It is a cyclic number.

It is not a de Polignac number, because 194894213 - 2⁶ = 194894149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194894233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97447106 + 97447107.

It is an arithmetic number, because the mean of its divisors is an integer number (97447107).

Almost surely, 2^194894213 is an apocalyptic number.

It is an amenable number.

194894213 is a deficient number, since it is larger than the sum of its proper divisors (1).

194894213 is an equidigital number, since it uses as much as digits as its factorization.

194894213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 194894213 is about 13960.4517477050. The cubic root of 194894213 is about 579.7841180314.

The spelling of 194894213 in words is "one hundred ninety-four million, eight hundred ninety-four thousand, two hundred thirteen".