1930247993 has 2 divisors, whose sum is σ = 1930247994. Its totient is φ = 1930247992.

The previous prime is 1930247971. The next prime is 1930248011. The reversal of 1930247993 is 3997420391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1281425209 + 648822784 = 35797^2 + 25472^2 .

It is an emirp because it is prime and its reverse (3997420391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1930247993 - 2¹² = 1930243897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1930247903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965123996 + 965123997.

It is an arithmetic number, because the mean of its divisors is an integer number (965123997).

Almost surely, 2^1930247993 is an apocalyptic number.

It is an amenable number.

1930247993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1930247993 is an equidigital number, since it uses as much as digits as its factorization.

1930247993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 1930247993 is about 43934.5876616590. The cubic root of 1930247993 is about 1245.1003920056.

The spelling of 1930247993 in words is "one billion, nine hundred thirty million, two hundred forty-seven thousand, nine hundred ninety-three".