7988993 has 2 divisors, whose sum is σ = 7988994. Its totient is φ = 7988992.

The previous prime is 7988983. The next prime is 7989011. The reversal of 7988993 is 3998897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5895184 + 2093809 = 2428^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 7988993 - 2⁴ = 7988977 is a prime.

It is not a weakly prime, because it can be changed into another prime (7988923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3994496 + 3994497.

It is an arithmetic number, because the mean of its divisors is an integer number (3994497).

Almost surely, 2^7988993 is an apocalyptic number.

It is an amenable number.

7988993 is a deficient number, since it is larger than the sum of its proper divisors (1).

7988993 is an equidigital number, since it uses as much as digits as its factorization.

7988993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 7988993 is about 2826.4806739123. The cubic root of 7988993 is about 199.9082329004.

The spelling of 7988993 in words is "seven million, nine hundred eighty-eight thousand, nine hundred ninety-three".