194428097 has 2 divisors, whose sum is σ = 194428098. Its totient is φ = 194428096.

The previous prime is 194428079. The next prime is 194428103. The reversal of 194428097 is 790824491.

Together with previous prime (194428079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137334961 + 57093136 = 11719^2 + 7556^2 .

It is a cyclic number.

It is not a de Polignac number, because 194428097 - 2⁸ = 194427841 is a prime.

It is not a weakly prime, because it can be changed into another prime (194428067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97214048 + 97214049.

It is an arithmetic number, because the mean of its divisors is an integer number (97214049).

Almost surely, 2^194428097 is an apocalyptic number.

It is an amenable number.

194428097 is a deficient number, since it is larger than the sum of its proper divisors (1).

194428097 is an equidigital number, since it uses as much as digits as its factorization.

194428097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 194428097 is about 13943.7475952486. The cubic root of 194428097 is about 579.3215382206.

The spelling of 194428097 in words is "one hundred ninety-four million, four hundred twenty-eight thousand, ninety-seven".