787993 has 2 divisors, whose sum is σ = 787994. Its totient is φ = 787992.

The previous prime is 787981. The next prime is 787999. The reversal of 787993 is 399787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413449 + 374544 = 643^2 + 612^2 .

It is an emirp because it is prime and its reverse (399787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-787993 is a prime.

It is not a weakly prime, because it can be changed into another prime (787999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393996 + 393997.

It is an arithmetic number, because the mean of its divisors is an integer number (393997).

2⁷⁸⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

787993 is a deficient number, since it is larger than the sum of its proper divisors (1).

787993 is an equidigital number, since it uses as much as digits as its factorization.

787993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 787993 is about 887.6896980364. The cubic root of 787993 is about 92.3650039569.

The spelling of 787993 in words is "seven hundred eighty-seven thousand, nine hundred ninety-three".