19730899 has 2 divisors, whose sum is σ = 19730900. Its totient is φ = 19730898.

The previous prime is 19730891. The next prime is 19730917. The reversal of 19730899 is 99803791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19730899 - 2³ = 19730891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19730891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9865449 + 9865450.

It is an arithmetic number, because the mean of its divisors is an integer number (9865450).

Almost surely, 2^19730899 is an apocalyptic number.

19730899 is a deficient number, since it is larger than the sum of its proper divisors (1).

19730899 is an equidigital number, since it uses as much as digits as its factorization.

19730899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 19730899 is about 4441.9476584039. The cubic root of 19730899 is about 270.2188394972.

The spelling of 19730899 in words is "nineteen million, seven hundred thirty thousand, eight hundred ninety-nine".