194591491 has 2 divisors, whose sum is σ = 194591492. Its totient is φ = 194591490.

The previous prime is 194591459. The next prime is 194591531. The reversal of 194591491 is 194195491.

194591491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194591491 - 2⁵ = 194591459 is a prime.

It is not a weakly prime, because it can be changed into another prime (194595491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97295745 + 97295746.

It is an arithmetic number, because the mean of its divisors is an integer number (97295746).

Almost surely, 2^194591491 is an apocalyptic number.

194591491 is a deficient number, since it is larger than the sum of its proper divisors (1).

194591491 is an equidigital number, since it uses as much as digits as its factorization.

194591491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 194591491 is about 13949.6054066056. The cubic root of 194591491 is about 579.4837767054.

The spelling of 194591491 in words is "one hundred ninety-four million, five hundred ninety-one thousand, four hundred ninety-one".