194725819 has 2 divisors, whose sum is σ = 194725820. Its totient is φ = 194725818.

The previous prime is 194725777. The next prime is 194725823. The reversal of 194725819 is 918527491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194725819 - 2²³ = 186337211 is a prime.

It is a super-2 number, since 2×194725819² = 75836289170441522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194725829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97362909 + 97362910.

It is an arithmetic number, because the mean of its divisors is an integer number (97362910).

Almost surely, 2^194725819 is an apocalyptic number.

194725819 is a deficient number, since it is larger than the sum of its proper divisors (1).

194725819 is an equidigital number, since it uses as much as digits as its factorization.

194725819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 46.

The square root of 194725819 is about 13954.4193358233. The cubic root of 194725819 is about 579.6170867349.

The spelling of 194725819 in words is "one hundred ninety-four million, seven hundred twenty-five thousand, eight hundred nineteen".