194138611 has 2 divisors, whose sum is σ = 194138612. Its totient is φ = 194138610.

The previous prime is 194138591. The next prime is 194138617. The reversal of 194138611 is 116831491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194138611 - 2²¹ = 192041459 is a prime.

It is not a weakly prime, because it can be changed into another prime (194138617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97069305 + 97069306.

It is an arithmetic number, because the mean of its divisors is an integer number (97069306).

Almost surely, 2^194138611 is an apocalyptic number.

194138611 is a deficient number, since it is larger than the sum of its proper divisors (1).

194138611 is an equidigital number, since it uses as much as digits as its factorization.

194138611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 194138611 is about 13933.3632336202. The cubic root of 194138611 is about 579.0338761335.

The spelling of 194138611 in words is "one hundred ninety-four million, one hundred thirty-eight thousand, six hundred eleven".