8799779993 has 2 divisors, whose sum is σ = 8799779994. Its totient is φ = 8799779992.

The previous prime is 8799779977. The next prime is 8799780079. The reversal of 8799779993 is 3999779978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7168670224 + 1631109769 = 84668^2 + 40387^2 .

It is a cyclic number.

It is not a de Polignac number, because 8799779993 - 2⁴ = 8799779977 is a prime.

It is a super-2 number, since 2×8799779993² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8799779953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4399889996 + 4399889997.

It is an arithmetic number, because the mean of its divisors is an integer number (4399889997).

Almost surely, 2^8799779993 is an apocalyptic number.

It is an amenable number.

8799779993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8799779993 is an equidigital number, since it uses as much as digits as its factorization.

8799779993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486091368, while the sum is 77.

The square root of 8799779993 is about 93807.1425478892. The cubic root of 8799779993 is about 2064.5430255533.

The spelling of 8799779993 in words is "eight billion, seven hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred ninety-three".