19730449 has 2 divisors, whose sum is σ = 19730450. Its totient is φ = 19730448.

The previous prime is 19730443. The next prime is 19730467. The reversal of 19730449 is 94403791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 589824 = 4375^2 + 768^2 .

It is a cyclic number.

It is not a de Polignac number, because 19730449 - 2³ = 19730441 is a prime.

It is not a weakly prime, because it can be changed into another prime (19730441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9865224 + 9865225.

It is an arithmetic number, because the mean of its divisors is an integer number (9865225).

Almost surely, 2^19730449 is an apocalyptic number.

It is an amenable number.

19730449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19730449 is an equidigital number, since it uses as much as digits as its factorization.

19730449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 19730449 is about 4441.8970046592. The cubic root of 19730449 is about 270.2167851998.

The spelling of 19730449 in words is "nineteen million, seven hundred thirty thousand, four hundred forty-nine".