7800993 has 6 divisors (see below), whose sum is σ = 11268114. Its totient is φ = 5200656.

The previous prime is 7800973. The next prime is 7800997. The reversal of 7800993 is 3990087.

It can be written as a sum of positive squares in only one way, i.e., 7800849 + 144 = 2793^2 + 12^2 .

It is not a de Polignac number, because 7800993 - 2¹³ = 7792801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7800997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 433380 + ... + 433397.

It is an arithmetic number, because the mean of its divisors is an integer number (1878019).

Almost surely, 2^7800993 is an apocalyptic number.

It is an amenable number.

7800993 is a deficient number, since it is larger than the sum of its proper divisors (3467121).

7800993 is a wasteful number, since it uses less digits than its factorization.

7800993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866783 (or 866780 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 7800993 is about 2793.0257786136. The cubic root of 7800993 is about 198.3276637662.

The spelling of 7800993 in words is "seven million, eight hundred thousand, nine hundred ninety-three".