19730497 has 2 divisors, whose sum is σ = 19730498. Its totient is φ = 19730496.

The previous prime is 19730483. The next prime is 19730519. The reversal of 19730497 is 79403791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 229441 = 4416^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 19730497 - 2⁷ = 19730369 is a prime.

It is not a weakly prime, because it can be changed into another prime (19730437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9865248 + 9865249.

It is an arithmetic number, because the mean of its divisors is an integer number (9865249).

Almost surely, 2^19730497 is an apocalyptic number.

It is an amenable number.

19730497 is a deficient number, since it is larger than the sum of its proper divisors (1).

19730497 is an equidigital number, since it uses as much as digits as its factorization.

19730497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 19730497 is about 4441.9024077528. The cubic root of 19730497 is about 270.2170043263.

The spelling of 19730497 in words is "nineteen million, seven hundred thirty thousand, four hundred ninety-seven".