7999993 has 2 divisors, whose sum is σ = 7999994. Its totient is φ = 7999992.

The previous prime is 7999963. The next prime is 8000009. The reversal of 7999993 is 3999997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7441984 + 558009 = 2728^2 + 747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7999993 is a prime.

It is not a weakly prime, because it can be changed into another prime (7999913) 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, 3999996 + 3999997.

It is an arithmetic number, because the mean of its divisors is an integer number (3999997).

Almost surely, 2^7999993 is an apocalyptic number.

It is an amenable number.

7999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

7999993 is an equidigital number, since it uses as much as digits as its factorization.

7999993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1240029, while the sum is 55.

The square root of 7999993 is about 2828.4258873091. The cubic root of 7999993 is about 199.9999416666. Note that the first 4 decimals are identical.

It can be divided in two parts, 7 and 999993, that added together give a 6-th power (1000000 = 10⁶).

The spelling of 7999993 in words is "seven million, nine hundred ninety-nine thousand, nine hundred ninety-three".