730019993 has 2 divisors, whose sum is σ = 730019994. Its totient is φ = 730019992.

The previous prime is 730019947. The next prime is 730020017. The reversal of 730019993 is 399910037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427538329 + 302481664 = 20677^2 + 17392^2 .

It is an emirp because it is prime and its reverse (399910037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 730019993 - 2⁸ = 730019737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 730019993.

It is not a weakly prime, because it can be changed into another prime (730019903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365009996 + 365009997.

It is an arithmetic number, because the mean of its divisors is an integer number (365009997).

Almost surely, 2^730019993 is an apocalyptic number.

It is an amenable number.

730019993 is a deficient number, since it is larger than the sum of its proper divisors (1).

730019993 is an equidigital number, since it uses as much as digits as its factorization.

730019993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 730019993 is about 27018.8821567436. The cubic root of 730019993 is about 900.4195545909.

The spelling of 730019993 in words is "seven hundred thirty million, nineteen thousand, nine hundred ninety-three".