7919993 has 2 divisors, whose sum is σ = 7919994. Its totient is φ = 7919992.

The previous prime is 7919971. The next prime is 7920019. The reversal of 7919993 is 3999197.

It is a happy number.

7919993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4545424 + 3374569 = 2132^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 7919993 - 2¹⁸ = 7657849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7919693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959996 + 3959997.

It is an arithmetic number, because the mean of its divisors is an integer number (3959997).

Almost surely, 2^7919993 is an apocalyptic number.

It is an amenable number.

7919993 is a deficient number, since it is larger than the sum of its proper divisors (1).

7919993 is an equidigital number, since it uses as much as digits as its factorization.

7919993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137781, while the sum is 47.

The square root of 7919993 is about 2814.2482122229. The cubic root of 7919993 is about 199.3310399570.

The spelling of 7919993 in words is "seven million, nine hundred nineteen thousand, nine hundred ninety-three".