1948307993 has 2 divisors, whose sum is σ = 1948307994. Its totient is φ = 1948307992.

The previous prime is 1948307969. The next prime is 1948308007. The reversal of 1948307993 is 3997038491.

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., 1925191129 + 23116864 = 43877^2 + 4808^2 .

It is an emirp because it is prime and its reverse (3997038491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1948307993 - 2⁶ = 1948307929 is a prime.

It is not a weakly prime, because it can be changed into another prime (1948307903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974153996 + 974153997.

It is an arithmetic number, because the mean of its divisors is an integer number (974153997).

Almost surely, 2^1948307993 is an apocalyptic number.

It is an amenable number.

1948307993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948307993 is an equidigital number, since it uses as much as digits as its factorization.

1948307993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 1948307993 is about 44139.6419672838. The cubic root of 1948307993 is about 1248.9715258648.

The spelling of 1948307993 in words is "one billion, nine hundred forty-eight million, three hundred seven thousand, nine hundred ninety-three".