19730747 has 2 divisors, whose sum is σ = 19730748. Its totient is φ = 19730746.

The previous prime is 19730719. The next prime is 19730771. The reversal of 19730747 is 74703791.

It is a strong prime.

It is an emirp because it is prime and its reverse (74703791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19730747 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19730747.

It is not a weakly prime, because it can be changed into another prime (19730707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9865373 + 9865374.

It is an arithmetic number, because the mean of its divisors is an integer number (9865374).

Almost surely, 2^19730747 is an apocalyptic number.

19730747 is a deficient number, since it is larger than the sum of its proper divisors (1).

19730747 is an equidigital number, since it uses as much as digits as its factorization.

19730747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 19730747 is about 4441.9305487592. The cubic root of 19730747 is about 270.2181456047.

The spelling of 19730747 in words is "nineteen million, seven hundred thirty thousand, seven hundred forty-seven".