194497949 has 2 divisors, whose sum is σ = 194497950. Its totient is φ = 194497948.

The previous prime is 194497909. The next prime is 194497991. The reversal of 194497949 is 949794491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159012100 + 35485849 = 12610^2 + 5957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194497949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 194497894 and 194497903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194497909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97248974 + 97248975.

It is an arithmetic number, because the mean of its divisors is an integer number (97248975).

Almost surely, 2^194497949 is an apocalyptic number.

It is an amenable number.

194497949 is a deficient number, since it is larger than the sum of its proper divisors (1).

194497949 is an equidigital number, since it uses as much as digits as its factorization.

194497949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 56.

The square root of 194497949 is about 13946.2521488750. The cubic root of 194497949 is about 579.3909073490.

The spelling of 194497949 in words is "one hundred ninety-four million, four hundred ninety-seven thousand, nine hundred forty-nine".