8799779977 has 2 divisors, whose sum is σ = 8799779978. Its totient is φ = 8799779976.

The previous prime is 8799779953. The next prime is 8799779993. The reversal of 8799779977 is 7799779978.

8799779977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6195106681 + 2604673296 = 78709^2 + 51036^2 .

It is a cyclic number.

It is not a de Polignac number, because 8799779977 - 2¹¹ = 8799777929 is a prime.

It is a super-2 number, since 2×8799779977² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8799779897 and 8799779906.

It is not a weakly prime, because it can be changed into another prime (8799779917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4399889988 + 4399889989.

It is an arithmetic number, because the mean of its divisors is an integer number (4399889989).

Almost surely, 2^8799779977 is an apocalyptic number.

It is an amenable number.

8799779977 is a deficient number, since it is larger than the sum of its proper divisors (1).

8799779977 is an equidigital number, since it uses as much as digits as its factorization.

8799779977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882165816, while the sum is 79.

The square root of 8799779977 is about 93807.1424626078. The cubic root of 8799779977 is about 2064.5430243021.

Subtracting from 8799779977 its reverse (7799779978), we obtain a palindrome (999999999).

The spelling of 8799779977 in words is "eight billion, seven hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred seventy-seven".