948721993 has 2 divisors, whose sum is σ = 948721994. Its totient is φ = 948721992.

The previous prime is 948721883. The next prime is 948722011. The reversal of 948721993 is 399127849.

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., 696801609 + 251920384 = 26397^2 + 15872^2 .

It is a cyclic number.

It is not a de Polignac number, because 948721993 - 2²⁹ = 411851081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 948721993.

It is not a weakly prime, because it can be changed into another prime (948721393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 474360996 + 474360997.

It is an arithmetic number, because the mean of its divisors is an integer number (474360997).

Almost surely, 2^948721993 is an apocalyptic number.

It is an amenable number.

948721993 is a deficient number, since it is larger than the sum of its proper divisors (1).

948721993 is an equidigital number, since it uses as much as digits as its factorization.

948721993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 52.

The square root of 948721993 is about 30801.3310264346. The cubic root of 948721993 is about 982.6065530272.

The spelling of 948721993 in words is "nine hundred forty-eight million, seven hundred twenty-one thousand, nine hundred ninety-three".