194970491 has 2 divisors, whose sum is σ = 194970492. Its totient is φ = 194970490.

The previous prime is 194970443. The next prime is 194970493. The reversal of 194970491 is 194079491.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194970491 - 2¹⁸ = 194708347 is a prime.

Together with 194970493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194970493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97485245 + 97485246.

It is an arithmetic number, because the mean of its divisors is an integer number (97485246).

Almost surely, 2^194970491 is an apocalyptic number.

194970491 is a deficient number, since it is larger than the sum of its proper divisors (1).

194970491 is an equidigital number, since it uses as much as digits as its factorization.

194970491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 194970491 is about 13963.1834121020. The cubic root of 194970491 is about 579.8597471021.

The spelling of 194970491 in words is "one hundred ninety-four million, nine hundred seventy thousand, four hundred ninety-one".